Iocaste, 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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