Iocaste (moon)

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Iocaste or Jupiter XXIV, is a non-spherical moon of Jupiter. It was found by a team of astronomers from the University of Hawaii led by Scott S. Sheppard in 2000, and given the designation S/2000 J 3[1][2].

Iocaste orbits Jupiter at an average distance of 20,723,000 km in 609.427 days, at an inclination of 147° to the ecliptic (146° to Jupiter's equator) with an orbital 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 asteroid.[4][5]

The moon is about 5 kilometres in diameter[6] and appears grey, similar to C-type asteroids.[7]

References[change | change source]

  1. IAUC 7555: Satellites of Jupiter 2001 January 5 (discovery)
  2. 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)
  3. IAUC 7998: Satellites of Jupiter 2002 October 22 (naming the moon)
  4. Sheppard, S. S.; Jewitt, D. C.; An Abundant Population of Small Irregular Satellites Around Jupiter, Nature, Vol. 423 (May 2003), pp. 261-263
  5. 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
  6. 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
  7. Grav, T.; Holman, M. J.; Gladman, B. J.; and Aksnes, K.; Photometric survey of the irregular satellites, Icarus, Vol. 166 (2003), pp. 33-45
  1. Ephemeris IAU-MPC NSES
  2. Mean orbital parameters NASA JPL

Other websites[change | change source]