Moon
Hyperion
TypeMoon
Mass5.62 × 10¹⁸ kg
Diameter270 km
Orbital Radius1.5 million km
Orbital Period21.28 days
Known Moons0
Surface Gravity0.02 m/s²
Average Temp-180 °C
AtmosphereNone
Discovered ByWilliam Bond
Discovery Year1848
About Hyperion
A sponge-looking moon riddled with deep pits, about 40 percent empty space inside. The first non-round moon whose rotation was confirmed chaotic, tumbling unpredictably. Cassini passed 510 km away in 2005, one of its closest moon flybys.
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