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Physical Properties
761 km
3.076e21 kg
1.63 g/cm³
0.354 m/s²
323.12 h
0.31
61 K
Orbit
Uranus
583,520 km
0.0014
0.068°
13.463 d
Sources & Further Reading
- NASA — official mission / factsheet page
- Wikipedia — extensive cross-referenced article
- NASA u2014 Oberon
Numerical values (radius, mass, orbital elements, temperatures) are drawn from NASA NSSDC Planetary Fact Sheets, JPL Horizons, and the JPL Small-Body Database. Last refreshed: 2026-04-18 18:19:25.
Oberon is the second-largest moon of Uranus and its outermost major satellite. Voyager 2 imagery revealed a heavily cratered surface, unusual dark crater floors suggesting cryovolcanic resurfacing, and a striking 11 km mountain seen silhouetted against the limb. Like its sister moons, Oberon may host a thin deep water ocean produced by radiogenic heating.