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Solar System Exploration
Hyperion: Facts & Figures
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Discovered By
W. & G. Bond, W. Lassell
Date of Discovery
Orbit Size Around Saturn (semi-major axis)
Metric: 1,500,934 km
English: 932,637 miles
Periapsis (closest)
Metric: 1,466,112 km
Apoapsis (farthest)
Metric: 1,535,756 km
Sidereal Orbit Period (Length of Year)
0.058261465 Earth years
21.28 Earth days
Orbit Circumference
Metric: 9,429,377.34 km
Average Orbit Velocity
Metric: 18,462.9 km/h
Orbit Eccentricity
Orbit Inclination
0.615 degree
Mean Radius
Metric: 135.0 km
By Comparison: 205 x 130 x 110 km, tri-axial
Equatorial Circumference
Metric: 848.2 km
Metric: 10,305,995 km3
Metric: 5,585,537,250,153,240,000 kg
Scientific Notation: 5.5855 x 1018 kg
Metric: 0.544 g/cm3
Surface Area
Metric: 229,022.10 km2
Surface Gravity
Metric: 0.020 m/s2
Escape Velocity
Metric: 268 km/h
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Last Updated: 23 Apr 2015