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List of Solar System objects by size

This is a partial list of Solar System objects by size, arranged in descending order of mean volumetric radius, and divided into several size classes. These lists can also be sorted according to an object's mass and, for the largest objects, volume, density and surface gravity, insofar as these values are available. This list contains the Sun, the planets, dwarf planets, many of the larger small Solar System bodies (which includes the asteroids), all named natural satellites, and a number of smaller objects of historical or scientific interest, such as comets and near-Earth objects.

Some objects in the lower tables, despite their smaller radii, may be more massive than objects in the upper tables because they have a higher density.

Many trans-Neptunian objects (TNOs) have been discovered; in many cases their positions in this list are approximate, as there can be a large uncertainty in their measurement.

Solar System objects more massive than 1021 kilograms (one yottagram [Yg]) are known or expected to be approximately spherical. Astronomical bodies relax into rounded shapes (ellipsoids), achieving hydrostatic equilibrium, when their own gravity is sufficient to overcome the structural strength of their material. Objects made of ice become round more easily than those made of rock, and many icy objects are spheroidal at far lower sizes. The cutoff boundary for roundness is somewhere between 100 km and 200 km in radius.[1]

The larger objects in the mass range between 1018 kg to 1021 kg (1 to 1000 zettagrams [Zg]), such as Tethys, Ceres, and Mimas, have relaxed to an oblate-spheroid equilibrium due to their gravity, whereas the less massive rubble piles (e.g. Amalthea and Janus) are roughly rounded, but not spherical, and are dubbed "irregular".

Spheroidal bodies typically have some polar flattening due to the "centrifugal force" from their rotation, and can sometimes even have quite different equatorial diameters (scalene ellipsoids such as Haumea). Unlike bodies such as Haumea, the irregular bodies deviate significantly from the shape of an ellipsoid.

There can be difficulty in determining the diameter (within a factor of about 2) for typical objects beyond Saturn. (See 2060 Chiron as an example.) For TNOs there is some confidence in the diameters, but for non-binary TNOs there is no real confidence in the masses/densities. Many TNOs are often just assumed to have Pluto's density of 2.0 g/cm3, but it is just as likely that they have a comet-like density of only 0.5 g/cm3.[2] For example, if a TNO is incorrectly assumed to have a mass of 3.59×1020 kg based on a radius of 350 km with a density of 2 g/cm3 but is later discovered to have a radius of only 175 km with a density of 1 g/cm3, its true mass would be only 2.24×1019 kg.

The sizes and masses of many of the moons of Jupiter and Saturn are fairly well known due to numerous observations and interactions of the Galileo and Cassini orbiters. But for many of the moons with a radius less than ~100 km, such as Jupiter's Himalia, their masses are highly uncertain.[3] Further out from Saturn, the sizes and masses of objects are less clear. There has not yet been an orbiter around Uranus or Neptune for long-term study of their moons. For the small outer irregular moons of Uranus, such as Sycorax, which were not discovered by the Voyager 2 flyby, even different NASA web pages, such as the National Space Science Data Center[4] and JPL Solar System Dynamics,[3] give somewhat contradictory size and albedo estimates depending on which research paper is being cited.

There are uncertainties in the figures for mass and radius, and irregularities in the shape and density, with accuracy often depending on how close the object is to Earth or whether it has been visited by a probe.

Graphical overview

Relative sizes of the fifty largest bodies in the Solar System, colored by orbital region. Values are diameters in kilometers. Scale is logarithmic.

List of objects by radius

Larger than 400 km

It was once expected that any icy body larger than approximately 200 km in radius was likely to be in hydrostatic equilibrium (HE).[5] However, Rhea is the smallest body where detailed measurements have been made and are consistent with hydrostatic equilibrium,[6] whereas Iapetus is the largest determined not to be in hydrostatic equilibrium,[7] bracketing a radius of 750 km.

For simplicity and comparative purposes, the values are manually calculated assuming a sphericity of 1. The size of solid bodies does not include an object's atmosphere. For example, Titan looks bigger than Ganymede, but its solid body is smaller. For the giant planets, the "radius" is defined as the distance from the center at which the atmosphere reaches 1 bar of atmospheric pressure.[8] The radius of Saturn's main rings is 136,775 km.

Body[note 1] Image Radius[note 2] Volume Mass Density Gravity[note 3] Type Shape #
[note 4]
Discovery
(km) (R) (109 km3) (V) (1021 kg) (M) (g/cm3) (m/s2) ()
Sun
Sun in February.jpg
696342±65[9] 109.3 1,414,300,000 1,305,700 1,988,550,000 333,000 1.408 274.0 27.94 star round (HE) 1 -
Jupiter
Jupiter and its shrunken Great Red Spot.jpg
69911±6 10.97 1,431,280 1,321 1,898,600 317.83 1.326 24.79 2.528 planet (gas giant); has rings round (HE) 2 -
Saturn
Ringworld Waiting.jpg
58232±6
(w/o rings)
9.140 827,130 764 568,460 95.162 0.687 10.445 1.065 planet (gas giant); has rings round (HE) 3 -
Uranus
Uranus2.jpg
25362±7 3.981 68,340 63.1 86,832 14.536 1.27 8.69 0.886 planet (ice giant); has rings round (HE) 4 1781
Neptune
Neptune Full.jpg
24622±19 3.865 62,540 57.7 102,430 17.147 1.638 11.15 1.137 planet (ice giant); has rings round (HE) 5 1846
Earth
Africa and Europe from a Million Miles Away.png
6371.0±0.01 1 1,083.21 1 5,973.6 1 5.514 9.80665 1 planet (terrestrial) round (HE) 6 -
Venus
Venus-real color.jpg
6051.8±1.0
(w/o gas)
0.9499 928.43 0.857 4,868.5 0.815 5.243 8.872 0.905 planet (terrestrial) round (HE) 7 -
Mars
OSIRIS Mars true color.jpg
3389.5±0.2 0.5320 163.18 0.151 641.85 0.107 3.9335 ± 0.0004 3.721 0.379 planet (terrestrial) round (HE) 8 -
Ganymede
Jupiter III
Ganymede g1 true-edit1.jpg
2634.1±0.3 0.4135 76.30 0.0704 148.2 0.0248 1.936 1.428 0.146 moon of Jupiter round (HE) 9 1610
Titan
Saturn VI
Titan in true color.jpg
2574.73±0.09
(w/o gas)[a]
0.4037[a] 71.50 0.0658 134.5 0.0225 1.8798 ± 0.0044 1.354 0.138 moon of Saturn round (HE) 10 1655
Mercury
Mercury in color - Prockter07-edit1.jpg
2439.7±1.0 0.3829 60.83 0.0562 330.2 0.0553 5.427 3.7 0.377 planet (terrestrial) round (HE) 11 -
Callisto
Jupiter IV
Callisto.jpg
2410.3±1.5 0.3783 58.65 0.0541 107.6 0.018 1.8344 ± 0.0034 1.23603 0.126 moon of Jupiter round (HE) 12 1610
Io
Jupiter I
Io highest resolution true color.jpg
1821.6±0.5 0.2859 25.32 0.0234 89.3 0.015 3.528 ± 0.006 1.797 0.183 moon of Jupiter round (HE) 13 1610
Moon
Earth I
FullMoon2010.jpg
1737.1 0.2727 21.958 0.0203 73.5 0.0123 3.3464 1.625 0.166 moon of Earth round (not in HE)[10] 14 -
Europa
Jupiter II
Europa-moon.jpg
1560.8±0.5 0.2450 15.93 0.0147 48 0.008035 3.013 ± 0.005 1.316 0.134 moon of Jupiter round (HE) 15 1610
Triton
Neptune I
Triton Voyager 2.jpg
1353.4±0.9[a] 0.2124[a] 10.38 0.0096 21.5 0.003599 2.061 0.782 0.0797 moon of Neptune round (HE) 16 1846
Pluto
134340
Pluto in True Color - High-Res.jpg
1188.3±1.6[11] 0.186 7.057 0.00651 13.105 0.0022 1.87 ± 0.02 0.62 0.063 dwarf planet; plutino; multiple round (HE) 17 1930
Eris
136199
Eris and dysnomia2.jpg
1163±6[b][12] 0.1825[b] 6.59 0.0061 16.7[13] 0.0028 2.52 ± 0.05 0.824 0.084 dwarf planet; SDO; binary round (HE) 18 2003
Haumea
136108
Haumea Hubble.png
798±6 to 816[14][b] 2.36[c] 0.0022 4.006[15] 0.00066 1.8–1.9 0.401 0.0409 dwarf planet;
resonant KBO (7:12);
trinary; has rings
round
(scalene ellipsoid)
19 2004
Titania
Uranus III
Titania (moon) color, edited.jpg
788.4±0.6[d] 0.1237[d] 2.06 0.0019 3.526 0.00059 1.711 ± 0.005 0.378 0.0385 moon of Uranus round 20 1787
Rhea
Saturn V
PIA07763 Rhea full globe5.jpg
763.8±1.0[d] 0.1199[d] 1.87 0.0017 2.3166 0.00039 1.236 ± 0.005 0.26 0.027 moon of Saturn round
(HE, disputed)
21 1672
Oberon
Uranus IV
Voyager 2 picture of Oberon.jpg
761.4±2.6[a] 0.1195[a] 1.85 0.0017 3.014 0.0005 1.63 ± 0.05 0.347 0.035 moon of Uranus round 22 1787
Iapetus
Saturn VIII
Iapetus as seen by the Cassini probe - 20071008.jpg
734.5±2.8 0.1153 1.66 0.0015 1.9739 0.00033 1.088 ± 0.013 0.223 0.0227 moon of Saturn round (not in HE) 23 1671
Makemake
136472
Makemake moon Hubble image with legend (cropped).jpg
715+19
−11
[16]
0.112 1.53 0.0014 4.4 0.000737 2.3 ± 0.9 0.57 0.0581 dwarf planet; cubewano round 24 2005
2007 OR10
225088
2007 OR10 and its moon.png
615±25[17] 0.0983 1.03 0.0009 1.75 0.00029 1.72 ± 0.16 0.3 0.0306 resonant KBO (3:10) unknown 25 2007
Charon
Pluto I
Charon in True Color - High-Res.jpg
606±3 0.0951 0.932 0.0009 1.52 0.00025 1.702 ± 0.021 0.288 0.0294 moon of Pluto round 26 1978
Umbriel
Uranus II
PIA00040 Umbrielx2.47.jpg
584.7±2.8 0.0918 0.84 0.0008 1.2 0.00020 1.39 ± 0.16 0.234 0.024 moon of Uranus round 27 1851
Ariel
Uranus I
Ariel (moon).jpg
578.9±0.6 0.0909 0.81 0.0007 1.35 0.000226 1.66 ± 0.15 0.269 0.027 moon of Uranus round 28 1851
Dione
Saturn IV
Dione in natural light.jpg
561.4±0.4 0.0881 0.73 0.0007 1.096 0.000183 1.478 ± 0.003 0.232 0.0237 moon of Saturn round (not in HE) 29 1684
Quaoar
50000
Quaoar PRC2002-17e.jpg
555±2.5 0.0871 0.716 0.0007 1.4 ± 0.1 0.0002 2.2 ± 0.4[18] 0.3 0.0306 cubewano; binary unknown 30 2002
Tethys
Saturn III
PIA18317-SaturnMoon-Tethys-Cassini-20150411.jpg
531.1±0.6 0.0834 0.624 0.0006 0.6173 0.000103 0.984 ± 0.003[19] 0.145 0.015 moon of Saturn round (not in HE) 31 1684
Sedna
90377
Sedna PRC2004-14d.jpg
497.5±40 0.0785 0.516 0.0005 sednoid; detached object unknown 32 2003
Ceres
1
Ceres - RC3 - Haulani Crater (22381131691) (cropped).jpg
473[20] 0.0742 0.433 0.0004 0.939[21] 0.000157 2.17 0.28 0.029 dwarf planet; belt asteroid round (HE) 33 1801
2002 MS4
307261
2002MS4 Hubble.png
467±24 0.0733 0.427 0.0004 cubewano[22] unknown 34 2002
Orcus
90482
Orcus-vanth hst2.jpg
458±13 0.0719 0.404 0.0004 0.641 ± 0.19 0.0001 2.47[23] 0.2 0.0204 plutino; binary unknown 35 2004
Salacia
120347
Salacia Hubble.png
425±23 0.0667 0.3261 0.0003 0.438 ± 0.016[24] 0.000073 1.16+0.59
−0.36
[25]
0.162 0.0165 cubewano; binary unknown 36 2004
  star    giant planet    terrestrial planet    moon of Earth    moon of Jupiter    moon of Saturn    moon of Uranus    moon of Neptune    moon of Pluto

From 200 to 399 km

All imaged icy moons except Proteus with radii greater than 200 km are clearly round, although those under 400 km that have had their shapes carefully measured are not in hydrostatic equilibrium.[6] Most asteroids are rockier and less likely to be round; for example, 10 Hygiea is not, while 2 Pallas and 4 Vesta are borderline.[citation needed]

Body[note 1] Image Radius[note 2]
(km)
Mass
(1020 kg)
Density
(g/cm3)
Type[note 5] Remarks – shape[note 5] Refs[note 6]
r · M
2002 AW197
55565
2002AW197-Spitzer.jpg
384+20
−18
cubewano [26] · [26]
2013 FY27
532037
2013 FY27 small.png
370+45
−43
detached object; binary [27] · M
2003 AZ84
208996
2003AZ84 Hubble small.png
366 0.87±0.01 plutino; possible binary scalene ellipsoid[28] [28] · M
Varda
174567
Varda-ilmare hst.jpg
358.3±2.4 2.664±0.064 1.24+0.5
−0.35
cubewano; binary [29] · [26]
Dysnomia
Eris I
Eris and dysnomia2.jpg
350±58 moon of Eris [30] · M
2004 GV9
90568
2004-gv9 hst.jpg
340±17 cubewano [31] · M
2005 RN43
145452
2005-rn43 hst.jpg
339.5+27.5
−36.5
cubewano [31] · M
2015 RR245
523794
~335 - - resonant KBO (2:9) [32] · M
Varuna
20000
20000-varuna hst.jpg
334+77
−43
3.7 0.99 cubewano scalene ellipsoid [33] · [34]
2002 UX25
55637
20131105 2002 UX25 hst.png
332.5±14.5 1.25±0.03 0.82±0.11 cubewano; binary [18] · [35]
2014 UZ224 ~321.5 SDO [5] · M
Gǃkúnǁʼhòmdímà
229762
2007 UK126 Hubble (crop).png
319+12
−6
1.361±0.033 1.04±0.17 SDO; binary likely non-spherical[36] [36] · [37]
2010 RF43 318.03 SDO [38] · M
Ixion
28978
Ixion planetoid nasa.jpg
308.5+9.5
−10
plutino [39] · M
Chaos
19521
307.5 cubewano [5] · M
2014 EZ51
523692
~307.5 SDO [5] · M
2007 JJ43
278361
305+85
−70
cubewano [40] · M
2006 QH181
2006qh181 hst.jpg
~303.5 SDO [22] · M
2002 TC302
84522
84522-2002tc302 hst.jpg
295.5 resonant KBO (2:5) [5] · M
2002 XW93
78799
293.5 other TNO [5] · M
2010 KZ39 ~287 detached [5] · M
2010 JO179 ~287 SDO [5] · M
2014 WK509
523759
~287 SDO [5] · M
2010 RE64
523639
~280.5 SDO [5] · M
2014 AN55 ~280.5 SDO [5] · M
2013 FZ27
523671
~280.5 SDO [5] · M
2004 XR190
2004-xr190 hst.jpg
~280 SDO [5] · M
2002 XV93 274.6+10.85
−11.5
plutino [41] · M
2008 ST291
528381
~274.5 SDO [5] · M
2004 XA192
230965
~274.5 SDO [5] · M
2010 FX86 ~274.5 cubewano [5] · M
2003 VS2
84922
84922-2003vs2 hst.jpg
274.15+14.75
−22.3
plutino [42] · M
2003 UZ413
455502
~268 plutino likely scalene ellipsoid[43] [5] · M
2014 YA50 ~268 plutino [5] · M
2014 FC69 266.5 SDO [22] · M
2001 UR163
42301
42301-2001ur163 hst.jpg
265.7 resonant KBO (4:9) [44] · M
Vesta
4
Vesta full mosaic.jpg
262.7±0.1 2.59 3.46 belt asteroid type V formerly round (not in hydrostatic equilibrium: frozen-in ellipsoidal shape and large impact basins)[45][46] [47] · [47]
2005 RM43
145451
~262 SDO [5] · M
Pallas
2
Potw1749a Pallas crop.png
256±3 2.11±0.26 3.0±0.5 belt asteroid type B irregular[48], borderline [48] · [49]
2004 TY364
120348
256+18.5
−20
cubewano [39] · M
2010 VK201
523645
252.5 cubewano [50] · M
2003 QX113
2003qx113 hst.jpg
~252.5 SDO [22] · M
2011 FW62 ~251.5 plutino [5] · M
Enceladus
Saturn II
PIA17202-SaturnMoon-Enceladus-ApproachingFlyby-20151028.jpg
252.1±0.2 1.08±0.001 1.609±0.005 moon of Saturn round (not in hydrostatic equilibrium: frozen-in ellipsoidal shape) [51] · [52]
2018 VG18 ~250 SDO [53] · M
2005 UQ513
202421
249+31.5
−37.5
cubewano [26] · M
2004 NT33
444030
241.26 cubewano [54] · M
2014 UM33
472271
~239 cubewano [5] · M
Vanth
Orcus I
Orcus-vanth hst2.jpg
237.5±37.5 ~0.4 ~1.5 moon of 90482 Orcus [23] · [23]
Miranda
Uranus V
PIA18185 Miranda's Icy Face.jpg
235.8±0.7 0.659±0.075 1.2±0.15 moon of Uranus round [55] · [56]
Dziewanna
471143
471143-dziewanna hst.jpg
235+17.5
−5
SDO [57] · M
2015 AM281
495603
~234 resonant KBO (2:5) [22] · M
2005 TB190
145480
145480-2005tb190 hst.jpg
232±31 detached object [30] · M
1999 DE9
26375
230.5±22.5 resonant KBO (2:5) [58] · M
2003 FY128
120132
230±10.5 SDO [30] · M
2002 KX14
119951
119951-2002kx14 hst.jpg
227.5±27 cubewano [31] · M
2000 YW134
82075
~227.5 SDO [22] · M
2012 VP113 ~225 sednoid [59] · M
2002 VR128
84719
224.25+24.05
−21.6
plutino [41] · M
2011 GM27
471288
~223 cubewano [5] · M
2010 TJ ~221.5 SDO [22] · M
Hygiea
10
10 Hygiea 2MASS.jpg
217.83±4.5 10.76±0.47 1.85±0.12 belt asteroid type C irregular [60] · [60]
1999 CD158
469306
210.13 resonant KBO (4:7) [61] · M
Proteus
Neptune VIII
Proteus (Voyager 2).jpg
210±7 0.44 ~1.3 moon of Neptune irregular, borderline [3] · [3]
2005 QU182
303775
208±36.5 SDO [30] · M
2001 QF298
469372
204.1+20.1
−22.45
plutino [41] · M
2004 PF115
175113
203.15+48.8
−37.65
plutino [41] · M
Huya
38628
Huya Hubble.png
203±8 plutino; binary [18] · M
2010 VZ98
445473
200.67 SDO [62] · M

Legend:

  moon of Saturn    moon of Uranus    moon of Neptune    moon of Eris    minor-planet moon
SDO – scattered disc object
cubewano – classical Kuiper belt object
plutino – 2:3 orbital resonance with Neptune

From 100 to 199 km

This list contains a selection of objects estimated to be between 100 and 199 km in radius (200 and 399 km in diameter). The largest of these may lie above the boundary for hydrostatic equilibrium, but most are irregular. Most of the trans-Neptunian objects (TNOs) listed with a radius smaller than 200 km have "assumed sizes based on a generic albedo of 0.09" since they are too far away to directly measure their sizes with existing instruments. Mass switches from 1021 kg to 1018 kg (Zg). Main-belt asteroids have orbital elements constrained by (2.0 AU < a < 3.2 AU; q > 1.666 AU) according to JPL Solar System Dynamics (JPLSSD).[63] Many TNOs are omitted from this list as their sizes are poorly known.[22]

Body[note 1] Image Radius[note 2]
(km)
Mass
(1018 kg)
Type Remarks – shape Refs[note 6]
r · M
2004 UX10
144897
199±19.5 ~30 plutino [41] · [64]
Mimas
Saturn I
Mimas Cassini.jpg
198.2±0.4 37.49±0.03 moon of Saturn round (smallest body currently known to have an ellipsoidal shape, but not in hydrostatic equilibrium) [51] · [52]
1998 SN165
35671
196.5±19.5 cubewano [26] · M
Ilmarë
Varda I
Varda-ilmare hst.jpg
180.5+24
−19
moon of 174567 Varda [65] · M
2017 OF69 ~177.667 plutino [22] · M
Nereid
Neptune II
Nereid-Voyager2.jpg
170±25 moon of Neptune [3] · M
1996 TL66
15874
169.5±10 SDO [30] · M
2002 WC19
119979
119979-2002wc19 hst.jpg
~169 77±5.34 resonant KBO (1:2); binary [66] · [66]
2010 TY53 ~164.5 extended centaur [5] · M
Hiʻiaka
Haumea I
Haumea Hubble.png
~160 17.9±1.1 moon of Haumea [15] · [15]
Interamnia
704
Interamnia medie.gif
153.157±0.516 32.8±4.5 belt asteroid type F [67] · [68]
Europa
52
52 Europa Lightcurve Inversion.png
151.959±1.751 23.8±5.8 belt asteroid type C irregular shape[69] [70] · [68]
2004 EW95
120216
120216-2004ew95 hst.jpg
145.5 plutino [22] · M
Davida
511
511 Davida dettaglio.png
145.218±1.136 33.8±10.2 belt asteroid type C irregular shape [71] · [68]
1995 SN55 ~145 Lost centaur or transient TNO [5] · M
Sylvia
87
CMSylvia.png
143±5.5 14.78±0.06 outer belt asteroid type X; trinary irregular shape[69] [72] · [73]
Actaea
Salacia I
Salacia Hubble.png
143±12 moon of 120347 Salacia [24] · M
Hyperion
Saturn VII
Hyperion true.jpg
138.6±4 5.62±0.05 moon of Saturn irregular shape [6] · [6]
Lempo
47171
1999TC36-Trujillo-HST.png
136+8.5
−9.5
plutino; trinary [74] · M
1998 SM165
26308
1998SM165-Trujillo-HST.jpg
134±14 6.87±1.8 resonant KBO (1:2) irregular shape [75] · [75]
Euphrosyne
31
A643.M1067.shape.png
133.54±1.305 12.7±6.5 belt asteroid type C; binary irregular shape [70] · [68]
Chariklo
10199
10199 Chariklo Hubble.jpg
130.175 centaur has rings [76] · M
Eunomia
15
15Eunomia (Lightcurve Inversion).png
128.205±1.545 31.4±1.8 belt asteroid type S irregular shape[69] [77] · [68]
2005 RR43
145453
2005rr43-19831001.gif
~126 cubewano; Haumea family [78] · M
Hiisi
Lempo II
125.5+8
−8.5
secondary of 47171 Lempo [74] · M
Hektor
624
624Hektor-LB1-mag15.jpg
125±13 7.9±1.4 Jupiter trojan (L4) type D; binary irregular shape; contact binary [79] · [79]
Sila
79360
124.5+15
−15.5
10.8±0.22 cubewano; binary [80] · M
2007 RW10
309239
123.5±15 quasi-satellite of Neptune [30] · M
Juno
3
Juno from Hooker telescope.jpg
123.298±5.927 27.3±2.9 belt asteroid type S irregular shape[69] [67] · [68]
Altjira
148780
123+19
−70
cubewano; binary [26] · M
Cybele
65
65 Cybele.png
118.63±2.1 13.6±3.1 outer belt asteroid type C irregular shape [81] · [68]
Nunam
79360
118+14
−15
secondary of 79360 Sila [80] · M
2001 QC298 117.5+10.5
−11.5
11.88±0.14 cubewano; binary [26] · [26]
Psyche
16
Psyche asteroid eso crop.jpg
116.667 24.1±3.2 belt asteroid type M irregular shape [82] · [83]
Patientia
451
112.89±2.282 10.9±5.3 belt asteroid type C irregular shape [67] · [68]
2014 NW65
523727
~112.5 centaur [5] · M
Ceto
65489
Ceto-phorcys hst.jpg
111.5±5 5.4±0.4 extended centaur; binary [30] · [84]
2001 FP185
82158
111.295 SDO [85] · M
Herculina
532
532Herculina (Lightcurve Inversion).png
111.195±2.4 belt asteroid type S irregular shape[69] [81] · M
S/2007 (148780) 1
Altjira I
110.5+17
−62.5
secondary of 148780 Altjira [26] · M
Bamberga
324
Potw1749a Bamberga crop.png
110.346±0.721 10.3±1 belt asteroid type C irregular shape [67] · [68]
Doris
48
A570.M936.shape.png
108.237±2.379 6.12±2.96 belt asteroid type C irregular shape [67] · [68]
Chiron
2060 or 95P
2060 Chiron Hubble.jpg
107.8±4.95 centaur has rings [18] · M
Egeria
13
13Egeria (Lightcurve Inversion).png
107.365±5.765 8.82±4.25 belt asteroid type G irregular shape [68] · [68]
Iris
7
Iris asteroid eso.jpg
107±2.5 13.75±1.3 belt asteroid type S irregular shape [86] · [86]
Phoebe
Saturn IX
Phoebe cassini.jpg
106.56±0.76 8.292±0.01 moon of Saturn formerly round[87] [6] · [6]
S/2012 (38628) 1
Huya I
Huya Hubble.png
106.5±15 moon of 38628 Huya [18] · M
Deucalion
53311
~106 cubewano [22] · M
2015 TH367 ~105.5 centaur [5] · M
Camilla
107
107Camilla (Lightcurve Inversion).png
105.185±4.163 11.2±0.3 outer belt asteroid type C; trinary irregular shape[88] [67] · [68]
Fortuna
19
103.45±3.245 8.6±1.46 belt asteroid type G irregular shape [68] · [68]
Thisbe
88
88Thisbe (Lightcurve Inversion).png
102.2±4.56 15.3±3.1 belt asteroid type B irregular shape[88] [68] · [68]
Eugenia
45
101.164±1.084 5.63±0.0003 belt asteroid type F; trinary irregular shape[69] [67] · [89]
Legend:
  Jupiter trojan    centaur    moon of Saturn    moon of Neptune    moon of Haumea    minor-planet moon
centaur – asteroids orbiting between the outer planets
Jupiter trojan – asteroids located in Jupiter's L4 and L5 Lagrange points

From 50 to 99 km

This list contains a selection of objects 50 and 99 km in radius (100 km to 199 km in average diameter). The listed objects currently include most objects in the asteroid belt and moons of the giant planets in this size range, but many newly discovered objects in the outer Solar System are missing, such as those included in the following reference.[22] Asteroid spectral types are mostly Tholen, but some might be SMASS.

Body[note 1] Image Radius[note 2]
(km)
Mass
(1018 kg)
Type – notes Refs[note 6]
r · M
Chicago
334
99.385±2.799 5.06±5.63 belt asteroid type C [67] · [68]
Bienor
54598
99+3
−3.5
centaur [90] · M
Themis
24
A609.M1006.shape.png
97.759±2.179 5.89±1.91 belt asteroid type C; Themis family [67] · [68]
Larissa
Neptune VII
Larissa 1.jpg
97±5.4 ~4.2 moon of Neptune [91] · [e]
Ursula
375
375Ursula-LB1.jpg
96.815±1.26 8.45±5.26 belt asteroid type C [77] · [68]
S/2002 (2001 QC298) 1
2001 QC298 I
96+9
−10
secondary of 2001 QC298 [26] · M
S/2018 (532037) 1
2013 FY27 I
2013 FY27 small.png
~95 moon of (532037) 2013 FY27 [27] · M
Amphitrite
29
Potw1749a Amphitrite crop.png
94.779±0.565 12.9±2 belt asteroid type S [67] · [68]
Daphne
41
94.5±0.5 6.31±0.11 belt asteroid type C; binary [93] · [68]
Aurora
94
94Aurora (Lightcurve Inversion).png
93.75±3.628 6.23±3.64 belt asteroid type C [71] · [68]
Hermione
121
121Hermione (Lightcurve Inversion).png
93.5±3 4.97±0.33 outer belt asteroid type C; binary [94] · [68]
Bertha
154
93.425±0.915 9.19±5.2 belt asteroid type C [68] · [68]
Hebe
6
6hebe.png
92.59±1.45 13.9±1 belt asteroid type S [81] · [68]
Metis
9
9Metis (Lightcurve Inversion).png
91.506 8.39±1.67 belt asteroid type S [67] · [68]
Elektra
130
130Elektra (Lightcurve Inversion).png
90.326±1.349 6.6±0.4 belt asteroid type G; trinary [67] · [95]
Loreley
165
165Loreley (Lightcurve Inversion).png
90.042±1.032 ~19.1±1.9 belt asteroid type C [67] · [68]
Janus
Saturn X
PIA12714 Janus crop.jpg
89.5±1.4 1.898±0.001 moon of Saturn [6] · [6]
Teharonhiawako
88611
Teharonhiawako-sawiskera hst.jpg
89+16
−18
2.44±0.032 cubewano; binary [26] · [96]
Nemesis
128
88.97±1.035 5.97±2.56 belt asteroid type C [77] · [68]
Aegle
96
88.887±0.772 6.48±6.26 belt asteroid type T [67] · [68]
Diotima
423
423Diotima (Lightcurve Inversion).png
87.929±31.927 6.91±1.93 belt asteroid type C [67] · [68]
S/2015 (136472) 1
Makemake I
Makemake with moon.JPG
~87.5 moon of Makemake [97] · M
Galatea
Neptune VI
Galatea moon.jpg
87.4±4.9 2.12±0.08 moon of Neptune [91] · [98]
Aletheia
259
87.159±0.527 7.79±0.43 belt asteroid type CP/type X [67] · [68]
Phorcys
Ceto I
Ceto-phorcys hst.jpg
87+8
−9
1.67 secondary of 65489 Ceto [84] · [84]
Palma
372
372Palma (Lightcurve Inversion).png
86.821±1.42 5.15±0.64 belt asteroid type B [70] · [68]
Alauda
702
702Ala-mag13-occult.jpg
86.145±27.69 6.057±0.36 belt asteroid type C; binary [70] · [99]
Winchester
747
747Winchester (Lightcurve Inversion).png
85.855±1.55 3.81±2.22 belt asteroid type C [81] · [68]
Aspasia
409
409Aspasia (Lightcurve Inversion).png
85.506±0.578 11.8±2.3 belt asteroid type C [67] · [68]
Hilda
153
Hilda-LB1-mag14.jpg
85.315±1.65 outer belt asteroid; Hildas [81] · M
Pretoria
790
85.185±1.3 4.58±0.28 outer belt asteroid type P; Cybele asteroid [81] · [68]
Himalia
Jupiter VI
Cassini-Huygens Image of Himalia.png
85 4.2±0.6 moon of Jupiter [3] · [100]
Namaka
Haumea II
Haumea Hubble.png
~85 1.79±1.48 moon of Haumea [15] · [15]
Weywot
Quaoar I
Quaoar-weywot hst.jpg
~85 moon of 50000 Quaoar
Germania
241
84.45±1.55 ~0.86±5 belt asteroid type CP/type B [81] · [68]
Freia
76
76Freia (Lightcurve Inversion).png
84.18±0.975 1.97±4.2 outer belt asteroid type P/type X; Cybele asteroid [77] · [68]
Rhadamanthus
38083
~84 trans-Neptunian object [22] · M
Kalliope
22
83.768±1.527 8.16±0.26 belt asteroid type M; binary [67] · [101]
Stereoskopia
566
83.691±1.747 outer belt asteroid type C; Cybele asteroid [67] · M
Amalthea
Jupiter V
Amalthea (moon).png
83.5±2 2.08±0.15 moon of Jupiter [102] · [103]
Agamemnon
911
83.33±1.95 Jupiter trojan (L4) type D [81] · M
Elpis
59
82.559±2.253 3±0.5 belt asteroid type CP/type B [67] · [68]
Siegena
386
386Siegena (Lightcurve Inversion).png
82.505±1.35 8.14±1.58 belt asteroid type C [81] · [68]
Sycorax
Uranus XVII
Sycorax.jpg
82.5+18
−21
moon of Uranus [39] · M
Puck
Uranus XV
Puck.png
81±2 moon of Uranus [104] · M
Prokne
194
80.834±0.626 2.68±0.29 belt asteroid type C [67] · [68]
Eunike
185
80.232±1.008 3.56±2.61 belt asteroid type C [67] · [68]
Manwë
385446
Manwe-thorondor hst.jpg
80+12
−22
1.94±0.036 resonant KBO (4:7); binary [105] · [105]
Gyptis
444
79.666±0.245 10.6±2.8 belt asteroid type C [67] · [68]
Despina
Neptune V
Despina.jpg
78±4.7 moon of Neptune [91] · M
Hypatia
238
77.829±0.376 4.9±1.7 belt asteroid type C [67] · [68]
Merapi
536
77.585±1.765 ~26.1±4.7 belt asteroid type X [68] · [68]
Lachesis
120
77.566±0.567 belt asteroid type C [67] · M
Io
85
85Io (Lightcurve Inversion).png
77.395±1.9 2.57±1.48 belt asteroid type FC/type B [81] · [68]
Bononia
361
77.167±1.345 belt asteroid type D [67] · M
Minerva
93
93Minerva (Lightcurve Inversion).png
77.078±0.649 3.5±0.4 belt asteroid type C; trinary [67] · [68]
Alexandra
54
54Alexandra (Lightcurve Inversion).png
77.069±0.318 6.16±3.5 belt asteroid type C [67] · [68]
Laetitia
39
76.9±2.07 4.72±1.14 belt asteroid type S [68] · [68]
2004 TT357 76.25±5[f] resonant KBO (2:5); contact binary [106] · M
Berbericia
776
776Berbericia (Lightcurve Inversion).png
75.855±0.439 2.2±2.71 belt asteroid type C [67] · [68]
Juewa
139
139Juewa 20130831 (Multichord Occultation).jpg
75.558±0.798 5.54±2.2 belt asteroid type CP/type X [67] · [68]
Parthenope
11
75.24±1.03 5.91±0.45 belt asteroid type S [77] · [68]
Pales
49
74.9 4.22±2.15 belt asteroid type C [81] · [68]
Adeona
145
74.75±2.725 2.08±0.57 belt asteroid; Adeona family [68] · [68]
Eleonora
354
354Eleonora (Lightcurve Inversion).png
74.485±0.213 7.18±2.57 belt asteroid type S [67] · [68]
Comacina
489
74.064±1.94 belt asteroid type S [81] · M
1998 WW31
2000 (1998 WW31) 1.jpg
~74 2.66±0.02 cubewano; binary [107] · [107]
Arethusa
95
95Arethusa (Lightcurve Inversion).png
73.962±2.446 belt asteroid type C [71] · M
Flora
8
8Flora (Lightcurve Inversion).png
73.746±0.513 ~9.17±1.75 belt asteroid type S; Flora family [67] · [68]
Pulcova
762
762Pulcova-SwRI.gif
73.672±0.409 1.4±0.1 belt asteroid type F; binary [67] · [108]
Hispania
804
73.505±0.965 5±1.78 belt asteroid type P [77] · [68]
Lomia
117
73.39 6.08±0.63 belt asteroid type X [68] · [68]
Dione
106
73.295±1.4 3.06±1.54 belt asteroid type G [81] · [68]
Julia
89
Potw1749a Julia crop.png
72.742±0.633 6.71±1.82 belt asteroid type S [67] · [68]
Sibylla
168
72.683±1.609 3.92±1.8 belt asteroid type C [67] · [68]
Philomela
196
196Philomela (Lightcurve Inversion).png
72.313±2.043 4±1.53 belt asteroid type S [67] · [68]
Irene
14
14Irene (Lightcurve Inversion).png
72.045±0.97 2.91±1.88 belt asteroid type S [77] · [68]
Meliboea
137
71.885±1.255 7.27±3.07 belt asteroid type C [77] · [68]
Aglaja
47
70.95±4.36 3.25±1.68 belt asteroid type C [68] · [68]
Vibilia
144
70.67±1.38 5.3±1.2 belt asteroid type C [81] · [68]
Isolda
211
70.563±1.243 4.49±2.43 belt asteroid type C [67] · [68]
Adorea
268
70.294±1.591 3.25±2.26 belt asteroid type FC [71] · [68]
Patroclus
617
617 Patroclus Hubble.jpg
70.181±0.434 1.36±0.11 Jupiter trojan (L5) type P; binary [67] · [68]
Dido
209
70.175±5.06 4.59±7.42 belt asteroid type C [68] · [68]
Dembowska
349
349Dembowska (Lightcurve Inversion).png
69.715±2.15 3.58±1.03 belt asteroid type R [81] · [68]
Princetonia
508
69.845±1.155 2.99±0.65 belt asteroid type C [77] · [68]
Melpomene
18
A601.M993.shape.png
69.797±1.226 3 belt asteroid type S [67] · [49]
Bertholda
420
69.349±1.723 ~14.8±0.9 outer belt asteroid type P [67] · [68]
Hedwig
476
69.247±0.488 belt asteroid type P [67] · M
Nemausa
51
51Nemausa 20160903 (OccultationAndInversion).jpg
69.079±0.483 2.48±0.86 belt asteroid type G [67] · [68]
Hesperia
69
69Hesperia (Lightcurve Inversion).png
69.065±2.35 5.86±1.18 belt asteroid type M [81] · [68]
Typhon
42355
Typhon-echidna hst.jpg
69±4.5 0.87±0.03 SDO; resonant KBO (7:10); extended centaur; binary [90] · [109]
Liguria
356
68.28±0.94 ~7.83±1.5 belt asteroid type C [77] · [68]
Medea
212
68.06±1.25 ~13.2±1 belt asteroid type DCX [81] · [68]
Massalia
20
A112.M119.shape.png
67.84±1.837 5±1.04 belt asteroid type S [70] · [68]
Portia
Uranus XII
Uranus-Portia-Cressida-Ophelia-NASA.gif
67.6±4 moon of Uranus [3] · M
Wratislavia
690
690Wratislavia (Lightcurve Inversion).png
67.325±1.9 ~12.8±0.3 belt asteroid type CPF [81] · [68]
Eukrate
247
247Eukrate 20180512 (OccultationAndInversion).png
67.215±1.25 belt asteroid type CP/type Xc [81] · M
Papagena
471
471Papagena (Lightcurve Inversion).png
67.095±2.6 3.05±1.73 belt asteroid type S [77] · [68]
Protogeneia
147
147Protogeneia (Lightcurve Inversion).png
66.465±2.55 ~12.3±0.5 belt asteroid type C [81] · [68]
Emma
283
283Emma (Lightcurve Inversion).png
66.193±0.129 1.38±0.03 belt asteroid type X; binary [67] · [68]
Erminia
705
66.131±0.589 belt asteroid type X [67] · M
Lumen
141
66.08±0.755 ~8.25±5.77 belt asteroid type C [77] · [68]
Paha
Lempo II
1999TC36-Trujillo-HST.png
66+4
−4.5
0.746±0.001 moon of 47171 Lempo [74] · [110]
Lucina
146
146Lucina (Lightcurve Inversion).png
65.947 belt asteroid type C [111] · M
Sawiskera
Teharonhiawako I
Teharonhiawako-sawiskera hst.jpg
65.5+12
−13
secondary of 88611 Teharonhiawako [26] · M
Kleopatra
216
Kleopatra.jpg
65.333 4.64±0.02 belt asteroid type M; trinary [112] · [68]
Achilles
588
65.049±0.277 Jupiter trojan (L4) type DU [67] · M
Lamberta
187
64.938±1.217 1.8±0.85 belt asteroid type C [67] · [68]
Carlova
360
360Carlova (Lightcurve Inversion).png
64.563±1.416 belt asteroid type C [67] · M
Klymene
104
64.495±1.901 belt asteroid type C [67] · M
Ornamenta
350
350Ornamenta (Lightcurve Inversion).png
64.365±0.599 belt asteroid type C [67] · M
Polyxo
308
64.289±0.779 belt asteroid type T [67] · M
Dynamene
200
64.151±0.973 ~1.07±0.16 belt asteroid type C [67] · [68]
Desiderata
344
62.985±0.689 1.39±0.48 belt asteroid type C [71] · [68]
Panopaea
70
63.956±0.373 4.33±1.09 belt asteroid type C; Eunomia family [67] · [68]
Thule
279
63.295±1.85 belt asteroid type D [81] · M
Tanete
772
772Tanete 20171021 (Multichord Occultation).jpg
63.237±0.649 belt asteroid type C [67] · M
Ate
111
63.172±0.117 1.76±0.44 belt asteroid type C [67] · [68]
Borasisi
66652
Borasisi-pabu hst.jpg
63+12.5
−25.5
3.433±0.027 cubewano; binary [26] · [113]
Ino
173
62.911±0.745 4.79±3.11 belt asteroid type X [67] · [68]
Charybdis
388
62.877±0.944 belt asteroid type C [67] · M
Aemilia
159
62.618±0.596 belt asteroid type C [67] · M
Pompeja
203
62.296±0.539 belt asteroid type DCX [70] · M
Aurelia
419
62.235±1.54 1.72±0.34 belt asteroid type F [68] · [68]
Hestia
46
62.07±1.7 3.5 belt asteroid type P/type Xc [81] · [114]
Boliviana
712
62.063±0.632 belt asteroid type C/type X [70] · M
2006 SQ372
308933
308933-2006sq372 hst.jpg
~62 extended centaur [5] · M
Argentina
469
61.555±0.825 4.53±1.76 belt asteroid type X; Cybele asteroid [77] · [68]
S/2000 (1998 WW31) 1
1998 WW31 I
2000 (1998 WW31) 1.jpg
~61.5 secondary of 1998 WW31 [107] · M
Gudrun
328
61.295±1.86 3.16±0.46 belt asteroid type S [68] · [68]
Leto
68
68Leto (Lightcurve Inversion).png
61.255±1.569 3.28±1.9 belt asteroid type S [67] · [68]
2001 QG298
139775
~61 plutino; contact binary [115] · M
Elfriede
618
60.77±0.795 belt asteroid type C [77] · M
Hippo
426
60.645±1.125 belt asteroid type F [77] · M
Undina
92
60.465±0.85 4.43±0.25 belt asteroid type X [77] · [68]
Bellona
28
28Bell-LB1-mag12.jpg
60.45±1.9 2.62±0.15 belt asteroid type S [116] · [68]
Diana
78
60.3±1.35 1.27±0.13 belt asteroid type C [117] · [68]
Myrrha
381
60.29±1.35 ~9.18±0.8 outer belt asteroid type C [81] · [68]
Anchises
1173
60.245±1.455 Jupiter trojan (L5) type P [77] · M
Armida
514
60.047±0.395 belt asteroid type XC [118] · M
Antigone
129
129Antigone (Lightcurve Inversion).png
59.72±1.955 2.65±0.89 belt asteroid type M [68] · [68]
Nuwa
150
59.564±0.935 1.62±0.2 belt asteroid type C [119] · [68]
Veritas
490
59.402±0.915 5.99±2.23 belt asteroid type C; Veritas family [120] · [68]
Paris
3317
59.395±0.588 Jupiter trojan (L5) type T [121] · M
Galatea
74
59.355±1.4 6.13±5.36 belt asteroid type C [122] · [68]
Deiphobus
1867
59.11±0.808 Jupiter trojan (L5) type D [123] · M
Äneas
1172
59.01±0.403 Jupiter trojan (L5) type D [124] · M
Diomedes
1437
58.893±0.59 Jupiter trojan (L4) type D [125] · M
Terpsichore
81
58.864±0.367 6.19±5.31 belt asteroid type C [126] · [68]
Ani
791
58.433±0.512 belt asteroid type C [127] · M
Freda
1093
58.365±1.45 belt asteroid type C [128] · M
Ulla
909
58.22±1.2 belt asteroid type X; Ulla family [129] · M
Zelinda
654
58.151±1.189 1.35±0.14 belt asteroid type C [67] · [68]
Chloris
410
58.123±0.422 ~6.24±0.3 belt asteroid type C [67] · [68]
Epimetheus
Saturn XI
PIA09813 Epimetheus S. polar region.jpg
58.1±1.8 5.266±0.006 moon of Saturn [6] · [6]
Johanna
127
127Johanna (Lightcurve Inversion).png
58.07±1.965 3.08±1.35 belt asteroid type C [130] · [68]
Circe
34
34Circe (Lightcurve Inversion).png
57.745±0.989 ~3.66±0.03 belt asteroid type C [67] · [68]
Leda
38
38Leda (Lightcurve Inversion).png
57.705±0.665 5.71±5.47 belt asteroid type C [68] · [68]
Eucharis
181
57.692±0.732 belt asteroid type S/type Xk [131] · M
Victoria
12
12Victoria (Lightcurve Inversion).png
57.544±0.599 2.45±0.46 belt asteroid type S [132] · [68]
Adelheid
276
276Adelheid (Lightcurve Inversion).png
57.362±1.638 belt asteroid type X [133] · M
Odysseus
1143
57.312±0.296 Jupiter trojan (L4) type D [134] · M
Alcathous
2241
56.841±0.858 Jupiter trojan (L5) type D [135] · M
Melete
56
56Melete (Lightcurve Inversion).png
56.62±0.85 4.61 belt asteroid type P [81] · [68]
Messalina
545
56.316±0.612 belt asteroid type C [136] · M
Mnemosyne
57
56.295±1.4 ~12.6±2.4 belt asteroid type S [137] · [68]
Nestor
659
56.16±0.925 Jupiter trojan (L4) type XC [138] · M
Sophrosyne
134
~56.094 belt asteroid type C [111] · M
Gǃòʼé ǃHú
Gǃkúnǁʼhòmdímà I
2007 UK126 Hubble (crop).png
56±38 moon of 229762 Gǃkúnǁʼhòmdímà [139] · M
Makhaon
3063
55.828±0.772 Jupiter trojan (L4) type D [140] · M
Atalante
36
36Atalante (Lightcurve Inversion).png
55.27±0.785 4.32±3.8 belt asteroid type C [77] · [68]
Athamantis
230
230Athamantis (Lightcurve Inversion).png
55.666±0.616 1.89±0.19 belt asteroid type S [77] · [68]
Hohensteina
788
55.648±0.392 belt asteroid [67] · M
Harmonia
40
40Harmonia (Lightcurve Inversion).png
55.626±0.196 belt asteroid type S [141] · M
Marianna
602
55.222±1.517 10.2±0.5 belt asteroid type C [142] · [68]
Xanthippe
156
55.205 ~6.49±3.71 belt asteroid type C [111] · [68]
Scheila
596
596 Scheila, 5 minute exposure, Dec. 12, 2010.jpg
55.204±0.997 belt asteroid type PCD/type T [143] · M
Semele
86
54.965±0.305 belt asteroid type C [67] · M
Eurterpe
27
27Euterpe (Lightcurve Inversion).png
54.895±0.77 1.67±1.01 belt asteroid type S [77] · [68]
Siwa
140
54.895±1.5 belt asteroid type P/type Xc [81] · M
Helio
895
54.784±0.994 9.87±6.05 outer belt asteroid type B [67] · [68]
Thia
405
54.447±0.156 1.38±0.14 belt asteroid type C [67] · [68]
Antilochus
1583
54.421±0.272 Jupiter trojan (L4) type D [67] · M
Fides
37
37Fides (Lightcurve Inversion).png
54.175±0.95 belt asteroid type S [144] · M
Gerlinde
663
53.898±0.786 belt asteroid type X [145] · M
Thalia
23
23Thalia (Lightcurve Inversion).png
53.765±1.1 1.96±0.09 belt asteroid type S [146] · [68]
Brixia
521
53.614±0.247 belt asteroid type C [147] · M
Iduna
176
53.488±0.54 belt asteroid type G [148] · M
Erato
62
62Erato (Lightcurve Inversion).png
53.461±0.329 belt asteroid type BU/type Ch; Themis family [149] · M
Astraea
5
5Astraea (Lightcurve Inversion).png
53.349±1.57 2.9 belt asteroid type S [150] · [114]
Ianthe
98
98Ianthe (Lightcurve Inversion).png
53.08±1.88 0.893±0.199 belt asteroid type C [68] · [68]
Ninina
357
53.05±1.1 belt asteroid type CX [81] · M
Albion
15760
~53 cubewano; classification name derived from its former designation 1992 QB1 [5] · M
Marion
506
52.97±1.3 belt asteroid type XC [151] · M
Adelinda
229
52.956±0.889 belt asteroid type BCU [152] · M
Ophelia
171
52.507±1.772 belt asteroid type C; Themis family [67] · M
Pabu
Borasisi I
Borasisi-pabu hst.jpg
52.5+10
−21
secondary of 66652 Borasisi [26] · M
Rollandia
1269
52.447±0.521 outer belt asteroid type D [153] · M
Mandeville
739
52.259±0.809 1.16±1.07 belt asteroid type X [154] · [68]
Corduba
365
52.255±1.21 ~5.84±0.95 belt asteroid type X/type C [68] · [68]
Eos
221
51.76±2.8 ~5.87±0.34 belt asteroid type S/type K [68] · [68]
Aegina
91
51.701±0.242 belt asteroid type C [155] · M
Leukothea
35
35Leukothea (Lightcurve Inversion).png
51.528±0.601 belt asteroid type C [156] · M
Menoetius
Patroclus I
617 Patroclus Hubble.jpg
51.4±0.25 secondary of 617 Patroclus [157] · M
Isis
42
42Isis (Lightcurve Inversion).png
51.365±1.365 1.58±0.52 belt asteroid type S [68] · [68]
Tauris
814
51.115±1.069 belt asteroid type C [158] · M
Helga
522
50.61±1.75 belt asteroid type X; Cybele asteroid [159] · M
Flammario
1021
50.383±0.804 5.14±0.12 belt asteroid type F [67] · [68]
Klotho
97
97Klotho (Lightcurve Inversion).png
50.359±0.321 1.33±0.13 belt asteroid type M [67] · [68]
Aquitania
387
50.255±1.45 1.8 belt asteroid type S [160] · [114]
Troilus
1208
50.239±0.549 Jupiter trojan (L5) type FCU [161] · M
Eva
164
50.127±0.469 0.929±0.776 belt asteroid type CX/type X[162] [162] · [68]
Legend:
  Jupiter trojan    centaur    moon of Jupiter    moon of Saturn    moon of Uranus    moon of Neptune    moon of Haumea    moon of Makemake    minor-planet moon

From 20 to 49 km

This list contains a few examples because there are about 589 asteroids in the asteroid belt with a measured radius between 20 and 49 km.[163] Many thousands of objects of this size range have yet to be discovered in the trans-Neptunian region. The number of digits is not an endorsement of significant figures. The table switches from ×1018 kg to ×1015 kg (Eg). Most mass values of asteroids are assumed.[68][49]

Body[note 1] Image Radius[note 2]
(km)
Mass
(1015 kg)
Type – notes Refs[note 6]
r · M
Asterope
233
49.836±0.573 belt asteroid type T/type K [164] · M
Pholus
5145
49.5+7.5
−7
centaur [90] · M
Nausikaa
192
192Nausikaa (Lightcurve Inversion).png
49.388±0.619 1790±420 belt asteroid type S [165] · [68]
Thebe
Jupiter XIV
Thebe.jpg
49.3±2 moon of Jupiter [102] · M
Lutetia
21
Rosetta triumphs at asteroid Lutetia.jpg
49±1 1700±17 belt asteroid type M [166] · [167]
Luscinia
713
48.984±0.438 outer belt asteroid type C [168] · M
Kalypso
53
53Kalypso (Lightcurve Inversion).png
48.631±13.299 ~5630±5000 belt asteroid type XC [169] · [68]
Laurentia
162
162Laurentia (Lightcurve Inversion).png
48.511±0.247 belt asteroid type STU/type Ch[170] [170] · M
Tercidina
345
345Tercidina (Lightcurve Inversion).png
48.4325±0.4905 2680±1180 belt asteroid type C [67] · [68]
Notburga
626
48.42±2.335 3240±1300 belt asteroid type CX/type Xc [68] · [68]
Henrietta
225
47.967±0.625 belt asteroid type F; Cybele asteroid [171] · M
Abastumani
1390
47.925±1.142 outer belt asteroid type P [172] · M
Euforbo
4063
47.809±0.339 Jupiter trojan (L4) type D [173] · M
Tisiphone
466
47.748±0.175 belt asteroid type C [174] · M
Adria
143
47.689±0.349 belt asteroid type C [175] · M
Arsinoë
404
47.485±0.476 3420±3030 belt asteroid type C [176] · [68]
Artemis
105
47.432±11.611 1540±540 belt asteroid type C [177] · [68]
Proserpina
26
A713.M1189.shape.png
47.4±0.85 748±895 belt asteroid type S [178] · [68]
Philosophia
227
47.318±1.278 belt asteroid [67] · M
Kolga
191
47.268±0.217 belt asteroid type XC/type Cb [179] · M
Andromache
175
47.266±0.542 belt asteroid type C [180] · M
Kassandra
114
47.089±0.477 belt asteroid type T [181] · M
Juliet
Uranus XI
Julietmoon.png
46.8±4 moon of Uranus [3] · M
Urania
30
30Urania (Lightcurve Inversion).png
46.394±1.02 1740±490 belt asteroid type S [182] · [68]
Thorondor
Manwë I
Manwe-thorondor hst.jpg
46+7
−13
moon of 385446 Manwë [105] · M
Irmintraud
773
45.836±0.45 belt asteroid type D/type T [183] · M
Ausonia
63
63Ausonia (Lightcurve Inversion).png
45.816±2.181 1530±150 belt asteroid type S [67] · [68]
Polyxena
595
595Polyxena (Lightcurve Inversion).png
45.324±0.724 outer belt asteroid [184] · M
Beatrix
83
44.819±1.326 belt asteroid type X [67] · M
Concordia
58
44.806±0.419 belt asteroid type C [67] · M
Teucer
2797
44.715±0.378 Jupiter trojan (L4) type D [185] · M
Echidna
Typhon I
Typhon-echidna hst.jpg
44.5±3 moon of 42355 Typhon [109] · M
Alkeste
124
124Alkeste 20030624 (MultichordOccultation).jpg
44.324±0.826 belt asteroid type S [186] · M
Automedon
2920
44.287±0.898 Jupiter trojan (L4) type D [187] · M
Vanadis
240
43.964±0.808 1100±920 belt asteroid type C [188] · [68]
Ottilia
401
43.902±0.218 belt asteroid type C [189] · M
90 Antiope
90 Antiope.gif
43.9±0.5 828±22 belt asteroid type C; binary [190] · [190]
Kythera
570
43.743±0.392 outer belt asteroid type T [191] · M
Hermentaria
346
43.224±0.963 6330±180 belt asteroid type S [192] · [68]
Prometheus
Saturn XVI
Prometheus 12-26-09a.jpg
43.1±2.7 159.5±1.5 moon of Saturn [6] · [6]
Lydia
110
110Lydia (Lightcurve Inversion).png
43.045±1 belt asteroid type M/type X [193] · M
Elara
Jupiter VII
Elara2-LB1-mag17.jpg
~43 moon of Jupiter [3] · M
Danaë
61
42.969±1.076 2890±2780 belt asteroid type S [194] · [68]
Hekate
100
42.867±0.981 belt asteroid type S [195] · M
Thetis
17
17Thetis-LB1.jpg
42.449±1.014 1200 belt asteroid type S [196] · [49]
Pandora
55
55Pandora (Lightcurve Inversion).png
42.397±1.251 belt asteroid type M [197] · M
Huenna
379
42.394±0.779 383±19 belt asteroid type B/type C; binary [198] · [95]
Virginia
50
42.037±0.121 2310±700 belt asteroid type X/type Ch [199] · [68]
Feronia
72
41.975±2.01 ~3320±8490 belt asteroid type TDG [68] · [68]
Hera
103
41.954±1.046 belt asteroid type S [200] · M
S/2000 (90) 1
Antiope I
90 Antiope.gif
41.9±0.5 secondary of 90 Antiope [190] · M
Miriam
102
41.298±0.2 belt asteroid type P/type C [201] · M
Felicitas
109
41.294±0.308 belt asteroid type GC/type Ch[202] [202] · M
Poulydamas
4348
41.016±0.313 Jupiter trojan (L5) type C [203] · M
Logos
58534
41±9 458±6.9 cubewano; binary [204] · [204]
Pandora
Saturn XVII
Pandora PIA07632.jpg
40.7±1.5 137.1±1.9 moon of Saturn [6] · [6]
Thalassa
Neptune IV
Neptune Trio.jpg
40.7±2.8 moon of Neptune [91] · M
S/2007 (119979) 1
2002 WC19 I
~40.5 moon of (119979) 2002 WC19 [66] · M
Gallia
148
40.435±0.52 ~4890±1670 belt asteroid type GU/type S [77] · [68]
Niobe
71
71Niobe (Lightcurve Inversion).png
40.43±0.4 belt asteroid type S [77] · M
Asbolus
8405
40.415 centaur [205] · M
Pomona
32
32Pomona (Lightcurve Inversion).png
40.38±0.8 belt asteroid type S [206] · M
Belinda
Uranus XIV
Belinda.gif
40.3±8 moon of Uranus [3] · M
Thyra
115
115Thyra (Lightcurve Inversion).png
39.915±0.7 belt asteroid type S [207] · M
Cressida
Uranus IX
Cressida.png
39.8±2 moon of Uranus [3] · M
Hertha
135
135Hertha (Lightcurve Inversion).png
39.62±1 belt asteroid type M [208] · M
Amycus
55576
38.15±6.25 centaur [58] · M
Hylonome
10370
10370 Hylonome Hubble.jpg
37.545 centaur [209] · M
Gaussia
1001
36.356±0.149 outer belt asteroid type PC [210] · M
Klio
84
39.16±0.48 belt asteroid type G/type Ch [77] · M
1974 FV1
3708
37.831±0.404 Jupiter trojan (L5) type C [67] · M
Nysa
44
44Nysa (Lightcurve Inversion).png
37.83±0.37 belt asteroid type E [77] · M
Hecuba
108
37.749±0.946 belt asteroid type S [211] · M
Cyrene
133
36.088±0.466 belt asteroid type S [212] · M
Rosalind
Uranus XIII
Rosalindmoon.png
36±6 moon of Uranus [3] · M
Caliban
Uranus XVI
Caliban feat.png
~36 moon of Uranus [3] · M
Maja
66
A737.M1234.shape(1).png
35.895±0.46 belt asteroid type C [77] · M
Sirona
116
35.85±2.9 belt asteroid type S [213] · M
Ariadne
43
43Ariadne (Lightcurve Inversion).png
35.67±0.627 ~1210±220 belt asteroid type S [214] · [68]
Iphigenia
112
35.535±0.26 ~1970±6780 belt asteroid type C [68] · [68]
Gerda
122
35.338±0.456 belt asteroid type ST/type L[215] [215] · M
Sappho
80
80Sappho (Lightcurve Inversion).png
34.282±0.517 belt asteroid type S [216] · M
Dike
99
99Dike (Lightcurve Inversion).png
33.677±0.208 belt asteroid type C [217] · M
Zoe
Logos I
~33.5 moon of 58534 Logos [204] · M
Desdemona
Uranus X
Desdemonamoon.png
32±4 moon of Uranus [3] · M
Helena
101
32.92±0.65 belt asteroid type S [218] · M
Echeclus
60558 or 174P
32.3±0.8 centaur [90] · M
Eurybates
3548
3548 Eurybates Hubble.jpg
31.943±0.149 Jupiter trojan (L4) type CP [67] · M
Eurynome
79
79Eurynome (Lightcurve Inversion).png
31.739±0.476 belt asteroid type S [219] · M
Eurydike
75
31.189±0.802 belt asteroid type M [220] · M
Thereus
5145
31±3 centaur [90] · M
Halimede
Neptune IX
Halimede.jpg
~31 moon of Neptune [3] · M
Crantor
82982
30.795 centaur [221] · M
Frigga
77
77Frigga 20180411(TripleChordOccultation).png
30.695±0.089 ~1740±680 belt asteroid type MU/type Xe[222] [222] · [68]
Phocaea
25
25Phocaea (Lightcurve Inversion).png
30.527±1.232 599±60 belt asteroid type S [67] · [68]
Naiad
Neptune III
Naiad Voyager.png
30.2±3.2 moon of Neptune [91] · M
Schwassmann–
Wachmann 1

29P
29P Schwassmann Wachmann.jpg
30.2±3.7 comet [223] · M
Hale–Bopp
C/1995 O1
Comet Hale-Bopp 1995O1.jpg
30±10 comet [224] · M
Neso
Neptune XIII
~30 moon of Neptune [3] · M
Angelina
64
60Echo (Lightcurve Inversion).png
29.146±0.541 belt asteroid type E [225] · M
Alkmene
82
82Alkmene (Lightcurve Inversion).png
28.811±0.357 belt asteroid type S [226] · M
Althaea
119
119Althaea (Lightcurve Inversion).png
28.65±0.55 belt asteroid type S [227] · M
Nessus
7066
7066 Nessus Hubble.jpg
28.5±8.5 centaur [90] · M
Asia
67
28.155±0.198 ~1030±100 belt asteroid type S [228] · [68]
Polana
142
27.406±0.139 belt asteroid type F [229] · M
Bianca
Uranus VIII
Biancamoon.png
27±2 moon of Uranus [3] · M
Tolosa
138
26.453±0.524 493±259 belt asteroid type S [230] · [68]
Mathilde
253
(253) mathilde crop.jpg
26.4 103.3±4.4 belt asteroid type C [231] · [232]
Hidalgo
944
Hidalgoanimation2003.gif
26.225±1.8 centaur, first to be discovered in 1920; historically called asteroid. [77] · M
Piazzia
1000
25.775±0.43 belt asteroid type C [77] · M
Orus
21900
21900 Orus Hubble.jpg
25.405±0.405 Jupiter trojan (L4) type C/type D [67] · M
Amalthea
113
25.069±0.633 belt asteroid type S; Flora family; binary [67] · M
Prospero
Uranus XVIII
Prospero discovery image.gif
~25 moon of Uranus [3] · M
Liberatrix
125
125Liberatrix (Lightcurve Inversion).png
24.209±0.267 belt asteroid type M [67] · M
Setebos
Uranus XIX
Uranus - Setebos image.jpg
~24 moon of Uranus [3] · M
Carme
Jupiter XI
Carmé.jpg
~23 130 moon of Jupiter [3] · M
Elatus
31824
31824 Elatus Hubble.jpg
22.935 centaur [233] · M
Brunhild
123
22.605±0.942 belt asteroid type S [234] · M
Velleda
126
~22.41±0.65 belt asteroid type S [235] · M
Klytia
73
73Klytia (Lightcurve Inversion).png
22.295±0.471 belt asteroid type S [236] · M
Sao
Neptune XI
~22 moon of Neptune [3] · M
Echo
60
60Echo (Lightcurve Inversion).png
21.609±0.286 315±32 belt asteroid type S [237] · [68]
Metis
Jupiter XVI
Metis.jpg
21.5±2 ~119.893 moon of Jupiter [102] · [238]
Aethra
132
132Aethra (Lightcurve Inversion).png
21.435±0.8 ~410±2710 belt asteroid type M [239] · [68]
Ophelia
Uranus VII
Opheliamoon.png
21.4±4 moon of Uranus [3] · M
Laomedeia
Neptune XII
~21 moon of Neptune [3] · M
Peitho
118
20.106±0.246 belt asteroid type S [240] · M
Cordelia
Uranus VI
Cordeliamoon.png
20.1±3 moon of Uranus [3] · M
Lacrimosa
208
208Lacrimosa (Lightcurve Inversion).png
20.028±0.297 belt asteroid type S; Koronis family [241] · M
Pasiphae
Jupiter VIII
Pasiphaé.jpg
~20 moon of Jupiter [3] · M
Siarnaq
Saturn XXIX
~20 moon of Saturn [3] · M
Psamathe
Neptune X
Psmathe feat.jpg
~20 moon of Neptune [3] · M
Legend:
  Jupiter trojan    centaur    moon of Jupiter    moon of Saturn    moon of Uranus    moon of Neptune    minor-planet moon

From 1 to 19 km

This list contains some examples of Solar System objects between 1 and 19 km in radius. This is a common size for asteroids, comets, and moons.

Body[note 1] Image Radius[note 2]
(km)
Mass
(1015 kg)
Type – notes Refs[note 6]
r · M
Urda
167
167Urda (Lightcurve Inversion).png
19.968±0.132 belt asteroid type S; Koronis family [242] · M
Hydra
Pluto III
Hydra Enhanced Color.jpg
19.65 48±42 moon of Pluto [243] · [244]
Koronis
158
158Koronis (Lightcurve Inversion).png
19.513±0.231 belt asteroid type S; Koronis family [245] · M
Nix
Pluto II
Nix best view.jpg
19.017 45±40 moon of Pluto [243] · [244]
Sinope
Jupiter IX
Sinopé.jpg
~19 moon of Jupiter [3] · M
Ganymed
1036
18.838±0.199 ~167±318 Amor asteroid type S [67] · [68]
Austria
136
18.447±0.259 belt asteroid type M [246] · M
Okyrhoe
52872
18±0.6 centaur [247] · M
Lysithea
Jupiter X
Lysithea2.jpg
~18 moon of Jupiter [3] · M
Helene
Saturn XII
Helene over Saturn.jpg
17.6±0.4 moon of Saturn; Dione trojan (L4) [6] · M
Hippocamp
Neptune XIV
S-2004 N1 Hubble montage.jpg
17.4 ~50 moon of Neptune [91] · [91]
Leucus
11351
11351 Leucus Hubble.jpg
17.078±0.323 Jupiter trojan (L4) type D [67] · M
Albiorix
Saturn XXVI
~16 moon of Saturn [3] · M
Stephano
Uranus XX
Stephano - Uranus moon.jpg
~16 moon of Uranus [3] · M
S/2002 (121) 1
Hermione I
~16 asteroid moon of 121 Hermione [94] · M
2014 MU69
486958
UltimaThule CA06 color 20190516.png
15.85±0.25 cubewano; contact binary; New Horizons flyby [248] · M
Weringia
226
15.747±0.155 belt asteroid type S [249] · M
Ida
243
243 Ida large.jpg
15.7 42±6 belt asteroid type S; Koronis family; binary; Galileo flyby [250] · [251]
Vala
131
15.669±0.152 belt asteroid type SU/type Xc[235] [252] · M
Comas Solà
1655
15.3±1.1 belt asteroid type B [253] · M
Beethoven
1815
15.299±0.084 belt asteroid type F [67] · M
Atlas
Saturn XV
Atlas 2017-04-12 raw preview.jpg
15.1±0.9 6.6 moon of Saturn [6] · [6]
Pan
Saturn XVIII
Pan by Cassini, March 2017.jpg
14.1±1.3 4.95 moon of Saturn [6] · [254]
Linus
Kalliope I
14±1 ~60 asteroid moon of 22 Kalliope [101] · [255]
Dioretsa
20461
14±3 centaur; damocloid [256] · M
Ananke
Jupiter XII
Ananké.jpg
~14 moon of Jupiter [3] · M
Perdita
Uranus XXV
13±1 moon of Uranus [3] · M
Telesto
Saturn XIII
Telesto cassini closeup.jpg
12.4±0.4 moon of Saturn; Tethys trojan (L4) [6] · M
Mab
Uranus XXVI
Mabmoon.png
12±1 moon of Uranus [3] · M
Medusa
149
11.859±0.134 belt asteroid type S [257] · M
Phobos
Mars I
Phobos colour 2008.jpg
11.267 10.659 moon of Mars [258] · [259]
Paaliaq
Saturn XX
~11 moon of Saturn [3] · M
Francisco
Uranus XXII
~11 moon of Uranus [3] · M
Calypso
Saturn XIV
N00151485 Calypso crop.jpg
10.7±0.7 moons of Saturn; Tethys trojan (L5) [6] · M
Polymele
15094
15094 Polymele Hubble.jpg
10.548±0.068 Jupiter trojan (L4) type P [81] · M
Leda
Jupiter XIII
~10 moon of Jupiter [3] · M
Margaret
Uranus XXIII
~10 moon of Uranus [3] · M
Ferdinand
Uranus XXIV
~10 moon of Uranus [3] · M
Euler
2002
9.887±0.029 belt asteroid type S [260] · M
S/2000 (762) 1
Pulcova I
762Pulcova-SwRI.gif
9.5±3.5 asteroid moon of 762 Pulcova [108] · M
Cupid
Uranus XXVII
Cupidmoon.png
9±1 moon of Uranus [3] · M
Ymir
Saturn XIX
~9 moon of Saturn [3] · M
Trinculo
Uranus XXI
~9 moon of Uranus [3] · M
Romulus
Sylvia I
CMSylvia.png
~9 93.19+207
−83
asteroid moon of 87 Sylvia [261] · [261]
Eros
433
Eros - PIA02923 (color).jpg
8.42±0.02 6.687±0.003 Amor asteroid type S; NEAR Shoemaker orbited and landed [262] · [262]
Adrastea
Jupiter XV
Adrastea.jpg
8.2±2 moon of Jupiter [3] · M
Kiviuq
Saturn XXIV
~8 moon of Saturn [3] · M
S/2001 (107) 1
Camilla I
8±3 asteroid moon of 107 Camilla [263] · M
Tarvos
Saturn XXI
Tarvos from Cassini.jpg
~7.5 moon of Saturn [3] · M
Herschel
2000
7.384 belt asteroid [67] · M
2002 RP120
65407
7.3±1.4 damocloid [264] · M
Kerberos
Pluto IV
Kerberos (moon).jpg
~6.333 16±9 moon of Pluto [265] · [266]
Gaspra
951
951 Gaspra.jpg
6.266 20–30 belt asteroid type S; Galileo flyby [267] · [268]
Deimos
Mars II
Deimos-MRO.jpg
6.2±0.18 1.476 moon of Mars [3] · [269]
Skamandrios
Hektor I
6±1.5 asteroid moon of 624 Hektor [79] · M
Ijiraq
Saturn XXII
Ijiraq discovery.gif
~6 moon of Saturn [3] · M
Halley's Comet
1P
Lspn comet halley.jpg
5.75 22 comet [270] · [271]
Styx
Pluto V
Styx (moon).jpg
~5.5 ~7.65 moon of Pluto [265] · [266]
Masursky
2685
Asteroid 2685Masurky.png
5.372±0.085 belt asteroid type S; Cassini flyby [272] · M
Damocles
5335
~5 centaur; damocloid [22] · M
Erriapus
Saturn XXVIII
~5 moon of Saturn [3] · M
Alexhelios
Kleopatra I
4.45±0.8 asteroid moon of 216 Kleopatra [273] · M
Callirrhoe
Jupiter XVII
S1999j1.jpg
~4.3 moon of Jupiter [3] · M
Comas Solà
32P
4.2 Jupiter-family comet [274] · M
Esclangona
1509
4.085±0.3 inner belt asteroid type S; binary [275] · M
Misterrogers
26858
4.035±0.085 Mars crosser type S [77] · M
Themisto
Jupiter XVIII
S 2000 J 1.jpg
~4 moon of Jupiter [3] · M
Daphnis
Saturn XXXV
Daphnis (Saturn's Moon).jpg
3.8±0.8 0.077±0.015 moon of Saturn [6] · [6]
Petit-Prince
Eugenia I
3.5±1 asteroid moon of 45 Eugenia [89] · M
S/2003 (130) 1
Elektra I
S-2014 (130) 1 by SPHERE-VLT 2014.jpg
3.5±1.5 asteroid moon of 130 Elektra [276] · M
Bestla
Saturn XXXIX
~3.5 moon of Saturn [3] · M
Remus
Sylvia II
CMSylvia.png
~3.5 73.3+47
−23
asteroid moon of 87 Sylvia [261] · [261]
Cleoselene
Kleopatra II
3.45±0.8 asteroid moon of 216 Kleopatra [273] · M
S/2019 (31) 1
Euphrosyne I
3.35±1.2 asteroid moon of 31 Euphrosyne [277] · M
Tempel 1
9P
Tempel 1 (PIA02127).jpg
3±0.1 Jupiter-family comet; Deep Impact flyby and impacted [278] · M
S/2006 S 1
(Lost moon)
3 0.15 Moon of Saturn [279]  · M
S/2006 S 3
(Lost moon)
3 0.15 Moon of Saturn [280]  · M
S/2004 S 13
(Lost moon)
3 0.15 Moon of Saturn [281]  · M
S/2007 S 2
(Lost moon)
3 0.15 Moon of Saturn [282]  · M
S/2004 S 7
(Lost moon)
3 0.15 Moon of Saturn [283]  · M
Phaethon
3200
PIA22185.gif
2.9 Apollo asteroid type F [284] · M
S/2003 (379) 1
Huenna I
2.9±0.6 asteroid moon of 379 Huenna [285] · M
1999 JM8
53319
Asteroid 1999 JM8.gif
2.7±0.6 Apollo asteroid type X [286] · M
Borrelly
19P
Comet Borrelly Nucleus.jpg
2.66 Jupiter-family comet [287] · M
S/2014 (130) 1
Elektra II
S-2014 (130) 1 by SPHERE-VLT 2014.jpg
2.6±0.6 asteroid moon of 130 Elektra [276] · M
Šteins
2867
2867 Šteins by Rosetta (reprocessed).png
2.58±0.084 belt asteroid type E; Rosetta flyby [67] · M
S/2004 (45) 1
Eugenia II
2.5±1 asteroid moon of 45 Eugenia [89] · M
S/2004 S 12
(Lost moon)
2.5 0.09 Moon of Saturn [288]  · M
S/2007 S 3
(Lost moon)
2.5 0.09 Moon of Saturn [289]  · M
Atira
163693
Atira.20jan17.u2.s1p0.gif
2.4±0.25 Atira asteroid type S; binary [290] · M
Annefrank
5535
Stardust - Annefrank.jpg
2.4 belt asteroid type S Stardust flyby [291] · M
Encke
2P
Comet Encke.jpg
~2.4 comet [292] · M
Comet Hyakutake
C/1996 B2
Comet Hyakutake from Hubble.jpg
~2.4 comet [293] · M
Balam
3749
2.332±0.107 0.51±0.02 belt asteroid type S; trinary [294] · [295]
Pallene
Saturn XXXIII
Pallene N1665945513 1.jpg
2.22±0.07 moon of Saturn [296] · M
Florence
3122
Triple asteroid 3122 Florence.gif
2.201±0.015 0.079±0.002 Amor asteroid type S; trinary [71] · [297]
Wild 2
81P
Wild2 3.jpg
2.133 Jupiter family comet; Stardust flyby [298] · M
Litva
2577
2.115 Mars-crosser type EU; Hungaria family; trinary [299] · M
Hal
9000
2.055 Inner belt asteroid type S; Flora family [300] · M
Littlewood
26993
2.0035 Main Belt Asteroid [301] · M
Churyumov–Gerasimenko
67P
Comet 67P on 19 September 2014 NavCam mosaic.jpg
2 0.00998 Jupiter-family comet [302] · [303]
Eirene
Jupiter LVII
2 0.09 Moon of Jupiter [304] · M
S/2004 S 17
(Lost moon)
2 0.05 Moon of Saturn [305]  · M
Donaldjohanson
52246
1.948±0.007 belt asteroid type C [306] · M
Toro
1685
1.905±0.025 Apollo asteroid type S [71] · M
Cuno
4183
4183 cuno.jpg
1.826±0.051 Apollo asteroid type S/type Q [307] · M
Aegis
Minerva I
1.8±0.5 asteroid moon of 93 Minerva [308] · M
S/2016 (107) 1
Camilla II
1.75±0.25 asteroid moon of 107 Camilla [263] · M
LINEAR
118401 or 176P
1.75±0.05 belt asteroid; comet; Themis family [309] · M
Holmes
17P
17pHolmes 071104 eder vga.jpg
~1.71 Jupiter-family comet [310] · M
Gorgoneion
Minerva II
1.6±0.45 asteroid moon of 93 Minerva [308] · M
1986 DA
6178
1.575 Amor asteroid type M [311] · M
Pichi üñëm
Alauda I
1.55±0.45 asteroid moon of 702 Alauda [312] · M
Toutatis
4179
Toutatis.jpg
1.516 0.0505 Apollo asteroid type S; Chang'e 2 flyby [313] · [313]
Kaʻepaokaʻawela
514107
~1.5 retrograde Jupiter co-orbital [314] · M
S/2016 J 1
Jupiter LIV
1.5 0.015 Moon of Jupiter [304] · M
Methone
Saturn XXXII
Methone PIA14633.jpg
1.45±0.03 moon of Saturn [296] · M
1998 QE2
285263
(285263) 1998 QE2, Goldstone, May 30, 2013.jpg
1.375 Amor asteroid type S; binary [315] · M
Polydeuces
Saturn XXXIV
Polydeuces.jpg
1.3±0.4 moon of Saturn; Dione trojan (L5) [6] · M
2001 SN263
153591
2001sn263 arecibo.png
1.315±0.2 0.00951±0.00013 Amor asteroid type C; trinary [316] · [317]
S/2003 (1509) 1
Esclangona I
~1.285 asteroid moon of 1509 Esclangona [318] · M
APL
132524
132524 APL New Horizons.jpg
~1.25 belt asteroid type S; New Horizons flyby [319] · M
Magellan
4055
CCD image of asteroid 4055 Magellan.png
1.245 Amor asteroid type V [320] · M
Camillo
3752
1.153±0.044 Apollo asteroid type S [71] · M
2002 VU94
90075
1.117±0.042 Apollo asteroid type S [321] · M
Cruithne
3753
Cruithne.jpg
1.036±0.053 Aten asteroid type Q; quasi-satellite of Earth [322] · M
Zephyr
12923
1.03±0.007 Apollo asteroid type S [71] · M
Ersa
Jupiter LXXI
1 0.015 Moon of Jupiter [304] · M
Pandia
Jupiter LXV
1 0.015 Moon of Jupiter [304] · M
S/2017 J 7
Jupiter LXVIII
1 0.015 Moon of Jupiter [304] · M
S/2017 J 6
Jupiter LXVII
1 0.015 Moon of Jupiter [304] · M
S/2017 J 3
Jupiter LXIV
1 0.015 Moon of Jupiter [304] · M
S/2017 J 5
Jupiter LXVI
1 0.015 Moon of Jupiter [304] · M
S/2017 J 2
Jupiter LXIII
1 0.015 Moon of Jupiter [304] · M
S/2017 J 1
Jupiter LIX
1 0.015 Moon of Jupiter [304] · M
S/2017 J 9
Jupiter LXX
1 0.015 Moon of Jupiter [304] · M
S/2010 J 1
Jupiter LI
1 Moon of Jupiter [304] · M
Eupheme
Jupiter LX
1 0.015 Moon of Jupiter [304] · M
S/2003 J 18
Jupiter LV
1 0.015 Moon of Jupiter [304] · M
S/2003 J 19
Jupiter LXI
1 0.015 Moon of Jupiter [304] · M
Philophrosyne
Jupiter LVIII
1 0.015 Moon of Jupiter [304] · M
S/2003 J 2
(Lost moon)
1 0.015 Moon of Jupiter [304] · M
S/2003 J 4
(Lost moon)
1 0.015 Moon of Jupiter [304] · M
S/2003 J 23
(Lost moon)
CENTER 1 0.015 Moon of Jupiter [304] · M
S/2003 J 10
(Lost moon)
1 0.015 Moon of Jupiter [304] · M
S/2003 J 16
(Lost moon)
1 0.015 Moon of Jupiter [304] · M
Euporie
Jupiter XXXIV
1 0.015 Moon of Jupiter [304] · M
Thelxinoe
Jupiter XLII
1 0.015 Moon of Jupiter [304] · M
Mneme
Jupiter XL
1 0.015 Moon of Jupiter [304] · M
Herse
Jupiter L
1 0.015 Moon of Jupiter [304] · M
Kale
Jupiter XXXVII
1 0.015 Moon of Jupiter [304] · M
Kallichore
Jupiter XLIV
1 0.015 Moon of Jupiter [304] · M
Pasithee
Jupiter XXXVIII
1 0.015 Moon of Jupiter [304] · M
Kore
Jupiter XLIX
1 0.015 Moon of Jupiter [304] · M
Legend:
  moon of Mars    Jupiter trojan    centaur    moon of Jupiter    moon of Saturn    moon of Uranus    moon of Neptune    moon of Pluto    minor-planet moon

Below 1 km

This list contains examples of objects below 1 km in radius. That means that irregular bodies can have a longer chord in some directions, hence the mean radius averages out.

In the asteroid belt alone there are estimated to be between 1.1 and 1.9 million objects with a radius above 0.5 km,[323] many of which are in the range 0.5–1.0 km. Countless more have a radius below 0.5 km.

Very few objects in this size range have been explored or even imaged. The exceptions are objects that have been visited by a probe, or have passed close enough to Earth to be imaged. Radius is by mean geometric radius. Number of digits not an endorsement of significant figures. Mass scale shifts from × 1015 to 109 kg, which is equivalent to one billion kg or 1012 grams (Teragram – Tg).

Currently most of the objects of mass between 109 kg to 1012 kg (less than 1000 teragrams (Tg)) listed here are near-Earth asteroids (NEAs). The Aten asteroid 1994 WR12 has less mass than the Great Pyramid of Giza, 5.9 × 109 kg.

For more about very small objects in the Solar System, see meteoroid, micrometeoroid, and interplanetary dust cloud. (See also Visited/imaged bodies.)

Body[note 1] Image Radius[note 2]
(m)
Mass
(109 kg)
Type – notes Refs[note 6]
r · M
Ra-Shalom
2100
2100Ra-Shalom (Lightcurve Inversion).png
990±25 Aten asteroid type C [77] · M
Geographos
1620
Geographos.jpg
980±30 Apollo asteroid type S [67] · M
Midas
1981
975±35 Apollo asteroid type S [77] · M
Mithra
4486
924.5±11 Apollo asteroid type S [71] · M
S/2002 (3749) 1
Balam I
~920 asteroid moon of 3749 Balam [295] · M
1998 OH
12538
831.5±164.5 Apollo asteroid type S [71] · M
S/2008 (3749) 1
Balam II
~830 asteroid moon of 3749 Balam [295] · M
Tantalus
2102
1862Apollo (Lightcurve Inversion).png
824.5±22.5 Apollo asteroid type Q [324] · M
Braille
9969
Braille3.jpg
820 Mars-crosser type Q; Deep Space 1 flyby [325] · M
2005 GO21
308242
2005GO21-20120617.jpg
780 Aten asteroid type S [326] · M
Apollo
1862
1862Apollo (Lightcurve Inversion).png
~750 Apollo asteroid type Q [327] · M
1999 JD6
85989
Asteroid 1999 JD6.jpg
731±10.5 Aten asteroid type K; contact binary [328] · M
Icarus
1566
730 Apollo asteroid type S [329] · M
Dactyl
Ida I
Dactyl-HiRes.jpg
700 asteroid moon of 243 Ida [330] · M
Castalia
4769
~700 Apollo asteroid type S; contact binary [331] · M
S/2009 (2577) 1
Litva I
~700 asteroid moon of 2577 Litva [332] · M
2007 PA8
214869
Pa8radar.jpg
675±70 Apollo asteroid type Q [333] · M
Moshup
66391
1999kw4 vlt-eso1910.jpg
658.5±20 2490±54 Aten asteroid type S; binary [334] · [335]
1950 DA
29075
1950 DA (color).png
653 ~2000 Apollo asteroid type S [336] · [337]
2006 HY51
394130
609±114 Apollo asteroid [338] · M
Wirtanen
46P
Comet 46P Wirtanen STSCI-H-p1863.png
~600 Jupiter-family comet [339] · M
S/2012 (2577) 1
Litva II
~600 asteroid moon of 2577 Litva [332] · M
Hartley 2
103P
Comet Hartley 2 (super crop).jpg
570±80 ~300 Jupiter-family comet; Deep Impact flyby [340] · [340]
S/2008 (153591) 1
2001 SN263 I
2001sn263 arecibo.png
~530 asteroid moon of (153591) 2001 SN263 [317] · M
2003 SD220
163899
PIA20279.jpg
515 Aten asteroid type S [341] · M
Nyx
3908
3908 nyx-s02.jpg
500±75 Amor asteroid type V [342] · M
S/2017 (163693) 1
Atira I
Atira.20jan17.u2.s1p0.gif
500±150 asteroid moon of 163693 Atira [290] · M
Valetudo
Jupiter LXII
Valetudo moon of Jupiter.jpg
~500 moon of Jupiter [343] · M
S/2017 J 8
Jupiter LXIX
~500 moon of Jupiter [343] · M
S/2010 J 2
Jupiter LII
~500 moon of Jupiter [343] · M
S/2003 J 12
(Lost moon)
500 1500 Moon of Jupiter [304] · M
S/2011 J 1
Jupiter LXXII
500 1500 Moon of Jupiter [304] · M
S/2011 J 2
Jupiter LVI
500 1500 Moon of Jupiter [304] · M
S/2003 J 9
(Lost moon)
500 1500 Moon of Jupiter [304] · M
2001 WN5
153814
466±5.5 Apollo asteroid [344] · M
1989 JA
7335
466±76.5 Apollo asteroid type S [71] · M
2017 YE5
PIA22559.gif
450±25 Apollo asteroid type S; binary [345] · M
Verenia
3551
~450 Amor asteroid type V [346] · M
Ryugu
162173
432.5±7.5 ~450 Apollo asteroid type Cg; visited by Hayabusa2 [347] · [348]
1997 AE12
162058
Asteroid 1997 AE12.gif
423.5±6.5 Amor asteroid type S [349] · M
2014 JO25
PIA21597 - New Radar Images of Asteroid 2014 JO25 (cropped).gif
409 Apollo asteroid type S; contact binary [350] · M
Hermes
69230
Hermes planetoid.jpg
400±50 Apollo asteroid type Sq [351] · M
1998 RO1
66063
400±75 447 Aten asteroid type S; binary [352] · [352]
Didymos
65803
Didymos-Arecibo-radar-images.png
390±4 527 Apollo asteroid type Xk; binary [353] · [354]
Aten
2062
365±15 Aten asteroid type S [67] · M
Aegaeon
Saturn LIII
N1643264379 1.jpg
330±60 moon of Saturn [296] · M
2015 TB145
Skull2015-TB145.jpg
325±15 Apollo asteroid type S [355] · M
1994 CC
136617
1994CC-with-moons.gif
310±30 266±32.9 Apollo asteroid type Sq; trinary [356] · [357]
2001 WR1
172034
315.5±9 Amor asteroid type S [358] · M
1992 FE
5604
~275 Aten asteroid type V [359] · M
1989 VA
99907
~273.5 Aten asteroid type Sq [360] · M
Golevka
6489
Asteroid-golevka.jpeg
265±15 Apollo asteroid type Q [361] · M
Bennu
101955
BennuAsteroid.jpg
262.5±37.5 78±9 Apollo asteroid type B; visited by OSIRIS-REx [362] · [363]
2004 UL
374158
~258 Apollo asteroid type S [364] · M
2000 WO107
153201
255±41.5 Aten asteroid type X [365] · M
2002 CU11
163132
230±8.5 Apollo asteroid [366] · M
S/2008 (153591) 2
2001 SN263 II
2001sn263 arecibo.png
~230 asteroid moon of (153591) 2001 SN263 [317] · M
Squannit
1999 KW4 I
1999kw4 vlt-eso1910.jpg
225.5±13.5 asteroid moon of 66391 Moshup [335] · M
1998 WT24
33342
(33342) 1998 WT24 bistatic radar image.gif
~205 Aten asteroid type E/type S [367] · M
2014 HQ124
PIA18412-Asteroid2014HQ124-20140608.jpg
204.5±84 Aten asteroid type S [67] · M
2013 YP139 201±13 Apollo asteroid [359] · M
2008 EV5
341843
Asteroid-2008EV5-ShapeModel-20111006.gif
200±7 Aten asteroid type X/type C [71] · M
2006 DP14
388188
Asteroid2006DP14.jpg
~200 Apollo asteroid type S; contact binary [368] · M
1988 EG
6037
199.5±1.35 Apollo asteroid type S [369] · M
S/2001 (66063) 1
1998 RO1 I
190±40 asteroid moon of (66063) 1998 RO1 [352] · M
2010 TK7
PIA14405-full crop.jpg
189.5±61.5 Aten asteroid; Earth trojan (L4) [370] · M
2006 HY51
394130
609±114 Apollo asteroid [338] · M
2006 SU49
292220
~188.5 ~73 Apollo asteroid [371] · [371]
2005 YU55
308635
2005YU55-20111107.jpg
180±20 Apollo asteroid type C [372] · M
2010 SO16 178.5±63 Apollo asteroid; co-orbital with Earth [359] · M
Itokawa
25143
173 35.1±1.05 Apollo asteroid type S; visited by Hayabusa [373] · [373]
Nereus
4660
Nereus.jpg
~165 Apollo asteroid type Xe [374] · M
Apophis
99942
99942 Apophis shape.png
162.5±7.5 ~61 Aten asteroid type Sq [375] · [376]
S/2009 S 1
PIA11665 moonlet in B Ring cropped.jpg
~150 moon of Saturn [377] · M
S/2017 (3122) 2
Florence II
3122 Florence with moons.jpg
~150 asteroid moon of 3122 Florence [297] · M
2005 WK4
Radar Goldstone (277475) 2005 WK4.jpg
~142 Apollo asteroid type S [378] · M
2004 BL86
357439
Radar images of 2004 BL86 and its moon 2.gif
131.5±13 Apollo asteroid type V; binary [379] · M
2007 TU24
2007 TU24 radar image 20080128.jpg
~125 Apollo asteroid type S [380] · M
2002 VE68 ~118 Aten asteroid type X; co-orbital with Venus [381] · M
2011 UW158
436724
2011UW158.jul14.p05us.p27Hz(1).gif
110±20 Apollo asteroid type S [382] · M
S/2017 (3122) 1
Florence I
3122 Florence with moons.jpg
~100 asteroid moon of 3122 Florence [297] · M
S/2003 (65803) 1
Didymos I
Didymos-Arecibo-radar-images.png
85±15 asteroid moon of 65803 Didymos [354] · M
2009 FD
410777
2009 FD.png
~80 ~3.2 Apollo asteroid type C; binary [383] · [383]
2017 BQ6
2017 BQ6 radar rotation.gif
78 Apollo asteroid type S [384] · M
1994 WR12 ~65 ~2.9 Aten asteroid [385] · [385]
YORP
54509
54509 YORP image radar and 3D model.gif
61.833 Apollo asteroid type S [386] · M
S/2009 (136617) 1
1994 CC I
1994CC-with-moons.gif
56.5±15 asteroid moon of (136617) 1994 CC [357] · M
S/2015 (357439) 1
2004 BL86 I
Radar images of 2004 BL86 and its moon 2.gif
~45 asteroid moon of (357439) 2004 BL86 [387] · M
S/2015 (410777) 1
2009 FD I
2009 FD.png
45±15 asteroid moon of (410777) 2009 FD [388] · M
2011 XC2 ~42.5 ~0.84 Apollo asteroid [389] · [389]
Kamoʻoalewa
469219
41 Apollo asteroid type S; quasi-satellite of Earth [390] · M
S/2009 (136617) 2
1994 CC II
1994CC-with-moons.gif
40±15 asteroid moon of (136617) 1994 CC [357] · M
2002 MN ~36.5 ~0.54 Apollo asteroid [391] · [391]
2015 HM10 ~28.5 Apollo asteroid/Amor asteroid type S [392] · M
2000 SG344
Asteroid 2000 SG344.gif
~20 ~0.071 Aten asteroid [393] · [393]
2016 CW30 ~16 Apollo asteroid [394] · M
Duende
367943
Radar-2012DA14-Goldstone.jpg
15 Aten asteroid/Atira asteroid type L [395] · M
1998 KY26
Asteroid 1998 KY26.faces model.jpg
~15 Apollo asteroid type X [396] · M
2010 AL30
2010al30-18frame-Goldstone.png
~15 Apollo asteroid [397] · M
2011 YQ1 ~15 Apollo asteroid [398] · M
2015 XA378 ~14 Apollo asteroid [399] · M
2009 RR ~13 ~0.024 Apollo asteroid [400] · [400]
2012 TC4
2012 TC4 radar animation before closest approach.gif
11.5 Apollo asteroid type E/type Xe [401] · M
2010 GA6
2010GA6 in April 8 2010.jpg
~11 Apollo asteroid [402] · M
2004 FH
Asteroid 2004 FH.gif
~11 Aten asteroid type S [403] · M
2014 RC
Asteroid 1997 AE12.gif
~11 Apollo asteroid type Sq [404] · M
2004 OD4 ~8.5 Apollo asteroid [405] · M
2009 TM8 ~4.5 Apollo asteroid [406] · M
2006 JY26 ~3.5 ~0.00052 Apollo asteroid [407] · [407]
2010 RF12 ~3.5 ~0.0005 Apollo asteroid [408] · [408]
2011 MD
PIA18453-Asteroid2011MD-SpitzerSpaceTelescope-IRAC-Feb2014.jpg
3+2
−1
Apollo asteroid/Amor asteroid type S [409] · M
2015 TC25 ~2.5 ~0.00012 Apollo asteroid type E [410] · [410]
2008 TC3
2008 TC3 Tumbling (reduced).gif
2.05 0.00008 Apollo asteroid type F/type M; impacted Earth in 2008 [411] · [411]
2019 AS5
2019 AS5-flyby.png
~0.76 Apollo asteroid [412] · M
2011 CQ1 ~0.5 Aten asteroid [413] · M
2008 TS26 ~0.49 Apollo asteroid [414] · M
Legend:
  moon of Jupiter    moon of Saturn    minor-planet moon

Surface gravity

The surface gravity at the equator of a body can in most cases be accurately calculated using Newton's law of universal gravitation and centrifugal force.

The gravitational acceleration at the equator is given by Newton's law of universal gravitation. The formula that follows from this law is:

where

ag is the magnitude of the gravitational acceleration
G is the gravitational constant
m is the mass of the celestial body
r is the equatorial radius of the celestial body (if this varies significantly, the mean equatorial radius is used)

The magnitude of the outward acceleration due to centrifugal force is given by

where

T is the rotation period of the celestial body

The surface gravity at the equator is then given by:

See also

Notes

  1. ^ a b c d e f Radius estimated using equatorial radius and assuming body is spherical
  2. ^ a b c Radius has been determined by various methods, such as optical (Hubble), thermal (Spitzer), or direct imaging via spacecraft
  3. ^ Calculated in Wolfram Alpha using semi axes of 1161 × 852 × 569 (Ellipsoid volume: 2.35761×10^9 km³)
  4. ^ a b c d Radius estimated by using three radii and assuming body is spheroid
  5. ^ The mass estimate is based on the assumed density of 1.2 g/cm³, and a volume of 3.5 ×106 km³ obtained from a detailed shape model in Stooke (1994).[92]
  6. ^ The mean radius of 76.25±5, or mean diameter of 152.5±10, is derived from the given dimensions 218±7 × 87±3


  1. ^ a b c d e f g Name of body, including alternative names using Roman numerals to designate moons (such as "Saturn I" for Mimas), and numbers to designate minor planets
  2. ^ a b c d e f g Mean radius including uncertainties
  3. ^ Given as surface gravity (1 bar for gaseous planets)
  4. ^ Ranking by radius of the largest bodies in the Solar System; may not reflect the latest updates of measured radii
  5. ^ a b Figures from default source Johnston's Archive—List of Known Trans-Neptunian Objects,[22] if otherwise not mentioned in the References column
  6. ^ a b c d e f Reference column specifically for radius (r) and mass (M) citations

References

  1. ^ Brown, M. "The Dwarf Planets". Caltech. Archived from the original on 2011-01-16. Retrieved 2008-09-25.
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