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S/2003 J 16

S/2003 J 16
Discovered byBrett J. Gladman
Discovery dateApril 2003
Orbital characteristics[1]
21000000 km
−595.4 days
Satellite ofJupiter
GroupAnanke group?
Physical characteristics
Mean diameter
2 km

S/2003 J 16 is a natural satellite of Jupiter. It was discovered by a team of astronomers led by Brett J. Gladman in 2003.[2][3]

S/2003 J 16 is about 2 kilometres in diameter, and orbits Jupiter at an average distance of 20,744 Mm in 610.362 days, at an inclination of 151° to the ecliptic (149° to Jupiter's equator), in a retrograde direction and with an eccentricity of 0.3185.

It belongs to the Ananke group, retrograde irregular moons which orbit Jupiter between 19.3 and 22.7 Gm, at inclinations of roughly 150°.

This moon is currently considered lost.[4][5][6][7] It was last seen in April 2017.[8]


  1. ^ S.S. Sheppard (2019), Moons of Jupiter, Carnegie Science, on line
  2. ^ IAUC 8116: Satellites of Jupiter and Saturn Archived 2006-05-05 at the Wayback Machine 2003 April (discovery)
  3. ^ MPEC 2003-G18: S/2003 J 16 2003 April (discovery and ephemeris)
  4. ^ Beatty, Kelly (4 April 2012). "Outer-Planet Moons Found — and Lost". Sky & Telescope. Retrieved 27 June 2017.
  5. ^ Brozović, Marina; Jacobson, Robert A. (9 March 2017). "The Orbits of Jupiter's Irregular Satellites". The Astronomical Journal. 153 (4): 147. Bibcode:2017AJ....153..147B. doi:10.3847/1538-3881/aa5e4d.
  6. ^ Jacobson, B.; Brozović, M.; Gladman, B.; Alexandersen, M.; Nicholson, P. D.; Veillet, C. (28 September 2012). "Irregular Satellites of the Outer Planets: Orbital Uncertainties and Astrometric Recoveries in 2009–2011". The Astronomical Journal. 144 (5): 132. Bibcode:2012AJ....144..132J. doi:10.1088/0004-6256/144/5/132.
  7. ^ Sheppard, Scott S. (2017). "New Moons of Jupiter Announced in 2017". Retrieved 27 June 2017. We likely have all of the lost moons in our new observations from 2017, but to link them back to the remaining lost 2003 objects requires more observations a year later to confirm the linkages, which will not happen until early 2018. ... There are likely a few more new moons as well in our 2017 observations, but we need to reobserve them in 2018 to determine which of the discoveries are new and which are lost 2003 moons.
  8. ^ "M.P.C. 110805" (PDF). Minor Planet Center. International Astronomical Union. Retrieved 31 October 2018.