Moon
An icy moon of Saturn with bright, wispy cliffs of fractured ice.
| Type | Moon |
|---|---|
| Orbits | Saturn |
| Distance from parent body | 377,400 km |
| Diameter | 1,123 km |
| Mass | 1.09 × 10^21 kg |
| Surface gravity | 0.233 m/s² |
| Temperature | -186°C |
| Orbital period | 3 days |
| Apparent magnitude | 10.4 |
| Redshift | 0 |
| Discovered | 1684 |
At 1,123 km across, Dione is 32 percent of the diameter of Earth's Moon.
Its mass is less than a thousandth of the mass of Earth.
It orbits Saturn at 377,400 km, closer in than the Moon orbits Earth.
A single orbit takes 2.7 days.
An average temperature of 87 K works out at -186 degrees Celsius, colder than the 15 degrees Earth averages.
It has been on record since 1684.
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