Rhea
Saturn's second-largest moon.
Rhea is the second-largest moon of Saturn, 1,528 km across, and the smallest body confirmed to be in hydrostatic equilibrium. It is about three-quarters ice and one-quarter rock, heavily cratered and tidally locked.
Giovanni Domenico Cassini discovered it on 23 December 1672. Both Voyagers and the Cassini orbiter have visited it.
Quick Facts
- Named after
- Ῥέᾱ Rheā
- Adjectives
- Rhean ˈ, r, eɪ,., ən
- Discoverer
- G. D. Cassini
- Discovered
- December 23, 1672
- Periapsis
- 526, 512 km / 318 mi
- Apoapsis
- 527, 567 km / 352 mi
- Average speed
- 8.48 km/s
- Inclination
- 0.35°
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