Tethys

Tethys has the lowest density out of all major moons in the Solar System, indicating that it is mostly made out of water ice.

Tethys

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Orbit	295,000 km
Diameter	1060 km
Gravity	15mg (negligable)
Day Length	Synchronous
Year Length	1.89 days
Atmospheric Pressure	None
Atmospheric Composition	None
Temperature	-187°C

Type

Planetoid / Moon

Location under

Saturn