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Jupiter XXIX

Proper NameThyone
DesignationJupiter XXIX
Primary PlanetJupiter
Orbital Period640 days
Mean Distance from JupiterSemi-Major Axis: 21,405,570 km
Periapsis: 15,998,523 km
Apoapsis: 26,812,617 km
Rotation PeriodNot known
Mean Diameterc.4 km
c.2.5 miles
NotesOne 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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