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Prometheus: Facts & Figures
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Discovered By
S. A. Collins, D. Carlson, Voyager 1
Date of Discovery
1980
Orbit Size Around Saturn (semi-major axis)
Metric: 139,380 km
English: 86,607 miles
Periapsis (closest)
Metric: 139,073 km
Apoapsis (farthest)
Metric: 139,687 km
Sidereal Orbit Period (Length of Year)
0.6130 Earth days
Orbit Circumference
Metric: 875,749.31 km
Average Orbit Velocity
Metric: 59,526.2 km/h
Orbit Eccentricity
0.0022
Orbit Inclination
0.008 degree
Mean Radius
Metric: 43.1 km
By Comparison: 74.0 x 50.0 x 34.0 km, tri-axial
Equatorial Circumference
Metric: 270.8 km
Volume
Metric: 335,367 km3
Mass
Metric: 160,956,989,714,639,000 kg
Scientific Notation: 1.6096 x 1017 kg
Density
Metric: 0.48 g/cm3
Surface Area
Metric: 23,343.42 km2
Surface Gravity
Metric: 0.006 m/s2
Escape Velocity
Metric: 80 km/h
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Last Updated: 4 Apr 2011