S/2000 J 11
| Discovery | |
|---|---|
| Discovered by | Scott S. Sheppard et al. |
| Discovery date | 2000 |
| Orbital characteristics | |
| Mean orbit radius | 12.1 million km |
| Eccentricity | 0.210[1] |
| Orbital period | 274 d |
| Inclination | 28.2°[1] |
| Satellite of | Jupiter |
| Physical characteristics | |
| Mean radius | ~2 km |
| Apparent magnitude | ~23[1] |
S/2000 J 11 is an object believed to be the second-outermost prograde irregular satellite of Jupiter.
The satellite was initially included in the Himalia group,[2] but its mean orbital elements were not well determined.
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 lead some astronomers to consider the moon lost.[6] One theory was that it crashed into Himalia, creating a faint ring around Jupiter.[7] However it was finally recovered in observations made in 2010 and 2011.[1]
References [edit]
- ^ 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.
- ^ Sheppard, S. S.; Jewitt, D. C.; An abundant population of small irregular satellites around Jupiter, Nature, 423 (May 2003), pp. 261-263
- ^ 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
- ^ IAUC 7555: Satellites of Jupiter 2001 January 5 (discovery)
- ^ 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)
- ^ 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.
- ^ "Lunar marriage may have given Jupiter a ring", New Scientist, March 20, 2010, p. 16.
External links [edit]
- Ephemeris IAU-MPC NSES
- Mean orbital parameters NASA JPL
- Scott Sheppard pages
- David Jewitt pages
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