Moon
A Saturnian moon almost entirely composed of water ice, with a massive canyon system.
| Type | Moon |
|---|---|
| Orbits | Saturn |
| Distance from parent body | 294,660 km |
| Diameter | 1,062 km |
| Mass | 6.17 × 10^20 kg |
| Surface gravity | 0.145 m/s² |
| Temperature | -187°C |
| Orbital period | 2 days |
| Apparent magnitude | 10.2 |
| Redshift | 0 |
| Discovered | 1684 |
At 1,062 km across, Tethys is 31 percent of the diameter of Earth's Moon.
Its mass is less than a thousandth of the mass of Earth.
It orbits Saturn at 294,660 km, closer in than the Moon orbits Earth.
A single orbit takes 1.9 days.
An average temperature of 86 K works out at -187 degrees Celsius, colder than the 15 degrees Earth averages.
It has been on record since 1684.
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