Moon
Co-orbital with Janus in one of the most unusual orbital relationships in the solar system.
| Type | Moon |
|---|---|
| Orbits | Saturn |
| Distance from parent body | 151,410 km |
| Diameter | 116 km |
| Mass | 5.30 × 10^17 kg |
| Surface gravity | 7.00e-3 m/s² |
| Temperature | -195°C |
| Orbital period | 1 days |
| Apparent magnitude | 15.6 |
| Redshift | 0 |
| Discovered | 1980 |
At 116 km across, Epimetheus is 3.3 percent of the diameter of Earth's Moon.
Its mass is less than a thousandth of the mass of Earth.
It orbits Saturn at 151,410 km, closer in than the Moon orbits Earth.
A single orbit takes 16.7 hours.
An average temperature of 78 K works out at -195 degrees Celsius, colder than the 15 degrees Earth averages.
It has been on record since 1980.
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