Moon
Shares nearly the same orbit as the moon Epimetheus, the two swapping positions every four years without colliding.
| Type | Moon |
|---|---|
| Orbits | Saturn |
| Distance from parent body | 151,460 km |
| Diameter | 179 km |
| Mass | 1.90 × 10^18 kg |
| Surface gravity | 0.0159 m/s² |
| Temperature | -195°C |
| Orbital period | 1 days |
| Apparent magnitude | 14.4 |
| Redshift | 0 |
| Discovered | 1966 |
At 179 km across, Janus is 5.2 percent of the diameter of Earth's Moon.
Its mass is less than a thousandth of the mass of Earth.
It orbits Saturn at 151,460 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 1966.
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