Thyone is a retrograde irregular-shaped satellite belonging to the outer planet of Jupiter. It was discovered by Scott S. Sheppard, David C. Jewett, and Jan T. Kleyna on December 11, 2001 at the Mauna Kea Observatory. It belongs to the Ananke group, a group of retrograde irregular satellites with Ananke being the largest of the group.
Thyone formed from the remains of the formation of the Ananke group. When Ananke suffered numerous collisions after being pulled into Jupiter's gravitational pull, one of the pieces became the moon now known as Thyone.
Little is known about Thyone's surface, yet what we assume is that there a mountainous areas near the western and eastern hemispheres. Since it is part of the Ananke moons, it is not impossible for it to possess craters and valleys near the equatorial center.
None of the Ananke moons are massive enough to maintain hydrostatic equilibrium. Thyone is believed to possess this trait from its mother Ananke. Due to this, Thyone is not believed to contain an atmosphere since no gases or traces are believed to be around Thyone.
Thyone was once given a provisional moon name called S/2001 J 2, given the two since it is the second moon of the Ananke group. It was then given the name after the mother of Dionysos.
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