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(126154) 2001 YH140

(126154) 2001 YH140
Discovered byMichael E. Brown,
Chadwick A. Trujillo[1]
Discovery date18 December 2001
MPC designation(126154) 2001 YH140
TNO (3:5 resonance)[2]
Orbital characteristics[1][3]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 2
Observation arc4777 days (13.08 yr)
Aphelion48.725 AU (7.2892 Tm)
Perihelion36.428 AU (5.4496 Tm)
42.577 AU (6.3694 Tm)
277.82 yr (101475 d)
0° 0m 12.772s / day
Physical characteristics
Dimensions345 ± 45 km[4]
Mass~4.0×1019 kg
13.25 h (0.552 d)
13.25 ± 0.2 h[5]
Temperature~42 K
5.8,[4] 5.5[3]

(126154) 2001 YH140, also written as (126154) 2001 YH140, is a resonant trans-Neptunian object discovered on 18 December 2001, by American astronomers Chad Trujillo and Michael Brown at the Palomar Observatory in California. It measures approximately 345 kilometers in diameter.[4]

Orbit and rotation

2001 YH140 is locked in 3:5 mean-motion resonance with Neptune.[4] When it makes three revolutions around the Sun, Neptune makes exactly five. The rotation period of (126154) 2001 YH140 is estimated to be 13.25 ± 0.2 hours.[5]

Physical characteristics

In 2010 thermal flux from (126154) 2001 YH140 in the far-infrared was measured by the Herschel Space Telescope. As a result, its size has been estimated to be 300–390 km (190–240 mi).[4]


  1. ^ a b "List Of Transneptunian Objects". IAU Minor Planet Center. Retrieved 2011-01-08.
  2. ^ "MPEC 2009-R09 :Distant Minor Planets (16 September 2009.0 TT)". IAU Minor Planet Center. 2009-09-04. Retrieved 2009-10-04.
  3. ^ a b "JPL Small-Body Database Browser: (126154) 2001 YH140" (last obs). 2009-02-02. Retrieved 11 April 2016.
  4. ^ a b c d e f Müller, T. G.; Lellouch, E.; Stansberry, J.; Kiss, C.; Santos-Sanz, P.; Vilenius, E.; Protopapa, S.; Moreno, R.; Mueller, M.; Delsanti, A.; Duffard, R.; Fornasier, S.; Groussin, O.; Harris, A. W.; Henry, F.; Horner, J.; Lacerda, P.; Lim, T.; Mommert, M.; Ortiz, J. L.; Rengel, M.; Thirouin, A.; Trilling, D.; Barucci, A.; Crovisier, J.; Doressoundiram, A.; Dotto, E.; Gutiérrez, P. J.; Hainaut, O. R.; Hartogh, P. (July–August 2010). ""TNOs are Cool": A survey of the trans-Neptunian region". Astronomy and Astrophysics. 518: L146. arXiv:1005.2923. Bibcode:2010A&A...518L.146M. doi:10.1051/0004-6361/201014683.
  5. ^ a b Sheppard, Scott S. (August 2007). "Light Curves of Dwarf Plutonian Planets and other Large Kuiper Belt Objects: Their Rotations, Phase Functions, and Absolute Magnitudes". The Astronomical Journal. 134 (2): 787–798. arXiv:0704.1636. Bibcode:2007AJ....134..787S. doi:10.1086/519072.

External links