Proteus
Neptune's second-largest moon.
Proteus is the second-largest moon of Neptune, about 400 km across, with a dark, heavily cratered and irregular shape. Its largest crater, Pharos, is more than 230 km wide.
Voyager 2 discovered it in 1989.
Quick Facts
- Discoverer
- Voyager 2; Stephen P. Synnott
- Discovered
- June 16, 1989
- Pronounced
- ˈ
- p
- r
- oʊ
- t
- i
- ə
- s PROH
- tee
- əs
- Named after
- Πρωτεύς or Πρωτέας, Prōteys or Prōteas
- Satellite of
- Neptune
- Surface area
- 554 200 km / 124 mi; 2
More in Celestial Bodies & Worlds
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