Thyone , also known as , 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 2001, and given the temporary designation .IAUC 7900: Satellites of Jupiter 2002  May 16 (discovery)MPEC 2002-J54: Eleven New Satellites of Jupiter 2002 May (discovery and ephemeris)
Thyone is about 4 kilometres in diameter, and orbits Jupiter at an average distance of 21,605,000 kilometres in 603.58 days, at an inclination of 147.28° to the ecliptic (146.93° to Jupiter's equator) with an eccentricity of 0.2526.
Its average orbital speed is 2.43 km/s.
It was named in August 2003 after Thyone, better known as Semele, mother of Dionysus in Greek mythology.IAUC 8177: Satellites of Jupiter, Saturn, Uranus  2003 August (naming the moon)
Thyone belongs to the Ananke group, retrograde irregular moons which orbit Jupiter between 19.3 and 22.7 million kilometres, at inclinations of roughly 150°.
thumb|left|Thyone imaged by the CFHT on 10 December 2001, one day before its discovery References
