Iocaste (moon)
| Discovery | |
|---|---|
| Discovered by | Scott S. Sheppard |
| Discovery date | November 23, 2000 |
| Designations | |
| Jupiter XXIV | |
| Adjectives | Ionian |
| Orbital characteristics | |
| Periapsis | 16,696,393 km (0.111 608 AU) |
| Apoapsis | 25,847,607 km (0.172 780 AU) |
|
Mean orbit radius
|
21,272,000 km (0.142 194 AU) |
| Eccentricity | 0.2874 |
| Satellite of | Jupiter |
| Physical characteristics | |
|
Mean radius
|
2.6 km |
| 84.95 km2 (0.082 Earths) | |
| Volume | 74 km3 (6.8×10−11 Earths) |
| Mass | 1.9483×1014 kg (3.26×10−11 Earths) |
|
Mean density
|
2.6 g/cm3 |
| 0.002 m/s2 (0.0002 g) | |
| 11 km/h | |
Iocaste (/aɪoʊˈkæstiː/ eye-o-KAS-tee; Greek: Ιοκάστη), also known as 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.
Iocaste orbits Jupiter at an average distance of 20,723 million kilometers 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, 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.
The satellite is about 5 kilometres in diameter and appears grey (colour indices B−V=0.63, R−V=0.36), similar to C-type asteroids.
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