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Pluto III

Proper NameHydra
Primary PlanetPluto
Orbital Period38 days
Distance from PlutoSemi-Major Axis: 64,738 km
Periapsis: 64,359 km
Apoapsis: 65,117 km
Rotation Period10.3 hours
Mean Diameter39.3 km
24.4 miles
NotesHydra is the outermost moon of Pluto, and the second largest (though it is very considerably smaller than Charon, the largest moon). Along with the three other small moons, Hydra is thought to have originated in a collision between Pluto and another Kuiper Belt object in the distant past.


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