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Pluto I

Proper NameCharon
Primary PlanetPluto
Orbital Period6.4 days
Distance from PlutoSemi-Major Axis: 17,536 km
Periapsis: 17,532 km
Apoapsis: 17,540 km
Rotation PeriodSynchronised with Pluto
Mean Diameter1,207 km
750 miles
NotesCharon is by far the largest and most massive of Pluto's five known moons. Indeed, its mass is so significant (approximately an eighth that of its parent planet) that the Pluto-Charon system is sometimes described as a 'double planet'. The two objects are tidally locked, so that each always shows the same face, as seen from the other.

One of several known moons of the distant dwarf planet Pluto. Charon's diameter of 1,200km is small in comparison to other bodies in the Solar System, but still makes it approximately half the diameter of its parent planet, which it orbits every 6.4 days. Pluto was the god of the underworld, and Charon is appropriately named from the ferryman who rowed the dead across the River Styx to the Pluto's domain.


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