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Rhea: Facts & Figures
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Discovered By
G.D. Cassini
Date of Discovery
Orbit Size Around Saturn (semi-major axis)
Metric: 527,068 km
English: 327,505 miles
Periapsis (closest)
Metric: 526,541 km
Apoapsis (farthest)
Metric: 527,595 km
Orbit Period (Length of Year)
0.01236961 Earth years
4.518 Earth days
Orbit Circumference
Metric: 3,311,665.09 km
Average Orbit Velocity
Metric: 30,541.4 km/h
Orbit Eccentricity
Orbit Inclination
0.333 degree
Mean Radius
Metric: 764.3 km
Equatorial Circumference
Metric: 4,802.2 km
Metric: 1,870,166,133 km3
Metric: 2,307,089,151,289,080,000,000 kg
Scientific Notation: 2.3071 x 1021 kg
Metric: 1.233 g/cm3
Surface Area
Metric: 7,340,701.82 km2
Surface Gravity
Metric: 0.264 m/s2
Escape Velocity
Metric: 2,285 km/h
Rotation Period (Length of Day)
By Comparison: Synchronous with orbital period
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Last Updated: 27 May 2014