S/2000 J 11

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S/2000 J 11
Discovered by Scott S. Sheppard et al.
Discovery date 2000
Orbital characteristics
Mean orbit radius
12.1 million km
Eccentricity 0.210[1]
274 d
Inclination 28.2°[1]
Satellite of Jupiter
Physical characteristics
Mean radius
≈2 km

S/2000 J 11 is the second-outermost known prograde irregular satellite of Jupiter.

The satellite is the only known small body in the Himalia group.[2]

S/2000 J 11 is believed to be about 4 kilometres in diameter.[3] It orbits Jupiter at an average distance of 12 million km in 274 days, at an inclination of 28° (to Jupiter's equator), and with an eccentricity of 0.21.[1]

Observational history[edit]

S/2000 J 11 was discovered by a team of astronomers from the University of Hawaii led by Scott S. Sheppard in 2000 with an observation arc of 26 days.[4][5]

Initial observations were not followed up, and S/2000 J 11 was not observed for more than a decade after 2000. This apparent disappearance led some astronomers to consider the moon lost.[6] One theory was that it had crashed into Himalia, creating a faint ring around Jupiter.[7] However, it was finally recovered in observations made in 2010 and 2011.[1]


  1. ^ a b c d e Gareth V. Williams (2012-09-11). "MPEC 2012-R22 : S/2000 J 11". Minor Planet Center. Retrieved 2012-09-11. 
  2. ^ Sheppard, S. S.; Jewitt, D. C.; An abundant population of small irregular satellites around Jupiter, Nature, 423 (May 2003), pp. 261-263
  3. ^ Sheppard, S. S.; Jewitt, D. C.; Porco, C.; Jupiter's outer satellites and Trojans, in Jupiter: The planet, satellites and magnetosphere, edited by Fran Bagenal, Timothy E. Dowling, William B. McKinnon, Cambridge Planetary Science, Vol. 1, Cambridge, UK: Cambridge University Press, ISBN 0-521-81808-7, 2004, pp. 263-280
  4. ^ IAUC 7555: Satellites of Jupiter 2001 January 5 (discovery)
  5. ^ MPEC 2001-A29: S/2000 J 7, S/2000 J 8, S/2000 J 9, S/2000 J 10, S/2000 J 11 2001 January 15 (discovery and ephemeris)
  6. ^ IAUC 7555, January 2001. "FAQ: Why don't you have Jovian satellite S/2000 J11 in your system?". JPL Solar System Dynamics. Retrieved 2011-02-13. 
  7. ^ "Lunar marriage may have given Jupiter a ring", New Scientist, March 20, 2010, p. 16.

External links[edit]