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Proper Name	Thyone
Designation	Jupiter XXIX
Primary Planet	Jupiter
Family / Class	Ananke group
Orbital Period	640 days (retrograde)
Distance from Jupiter	Semi-Major Axis: 21,406,000 km Periapsis: 15,999,000 km Apoapsis: 26,813,000 km
Eccentricity	0.2058
Rotation Period	Not known
Mean Diameter	c.4 km c.2.5 miles
Notes	One of a group of small satellites of Jupiter that orbit the planet in a retrograde direction (that is, in the opposite direction to Jupiter's own rotation). Thought to have originated in the breakup of an asteroid captured by Jupiter's gravity, these moons are collectively known as the Ananke Group.

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