Moon
Pluto's largest moon, so massive relative to Pluto that the two form a binary system.
| Type | Moon |
|---|---|
| Orbits | Pluto |
| Distance from parent body | 19,570 km |
| Diameter | 1,212 km |
| Mass | 1.59 × 10^21 kg |
| Surface gravity | 0.288 m/s² |
| Temperature | -220°C |
| Orbital period | 6 days |
| Apparent magnitude | 16.8 |
| Redshift | 0 |
| Discovered | 1978 |
At 1,212 km across, Charon is 35 percent of the diameter of Earth's Moon.
Its mass is less than a thousandth of the mass of Earth.
It orbits Pluto at 19,570 km, closer in than the Moon orbits Earth.
A single orbit takes 6.4 days.
An average temperature of 53 K works out at -220 degrees Celsius, colder than the 15 degrees Earth averages.
It has been on record since 1978.
Play today's Cosmodle