Iocaste (moon)
From Wikipedia, the free encyclopedia
- There is also an asteroid named 899 Jokaste.
Iocaste (eye'-ə-kas'-tee, IPA: /ˌaɪəˈkæsti/; Greek Ιοκάστη), or Jupiter XXIV, is a retrograde irregular satellite of Jupiter. It was discovered by a team of astronomers from the University of Hawaii led by Scott S. Sheppard in 2000, and given the temporary designation S/2000 J 3[1][2].
Iocaste orbits Jupiter at an average distance of 20,723 Mm in 609.427 days, at an inclination of 147° to the ecliptic (146° to Jupiter's equator) with an eccentricity of 0.2874.
It was named in October 2002 after Jocasta[3], the mother/wife of Oedipus in Greek mythology.
Iocaste belongs to the Ananke group, believed to be the remnants of a break-up of a captured heliocentric asteroid.[4][5]
The satellite is about 5 kilometres in diameter[6] and appears grey (colour indices B-V=0.63, R-V=0.36), similar to C-type asteroids.[7]
[edit] See also
[edit] References
- ^ IAUC 7555: Satellites of Jupiter 2001 January 5 (discovery)
- ^ MPEC 2001-A28: S/2000 J 2, S/2000 J 3, S/2000 J 4, S/2000 J 5, S/2000 J 6 2001 January 5 (discovery and ephemeris)
- ^ IAUC 7998: Satellites of Jupiter 2002 October 22 (naming the moon)
- ^ Sheppard, S. S.; Jewitt, D. C.; An Abundant Population of Small Irregular Satellites Around Jupiter, Nature, Vol. 423 (May 2003), pp. 261-263
- ^ Nesvorný, D.; Alvarellos, J. L. A.; Dones, L.; and Levison, H. F.; Orbital and Collisional Evolution of the Irregular Satellites, The Astronomical Journal, Vol. 126 (2003), pp. 398–429
- ^ Sheppard, S. S.; Jewitt, D. C.; Porco, C. 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
- ^ Grav, T.; Holman, M. J.; Gladman, B. J.; and Aksnes, K.; Photometric survey of the irregular satellites, Icarus, Vol. 166 (2003), pp. 33-45
- Ephemeris IAU-MPC NSES
- Mean orbital parameters NASA JPL
[edit] External links
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