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Solar System Exploration
Janus: Facts & Figures
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Discovered By
Audouin Dollfus
Date of Discovery
Orbit Size Around Saturn (semi-major axis)
Metric: 151,460 km
English: 94,113 miles
Periapsis (closest)
Metric: 150,430 km
Apoapsis (farthest)
Metric: 152,490 km
Sidereal Orbit Period (Length of Year)
0.001902806 Earth years
0.695 Earth days
Orbit Circumference
Metric: 951,640.25 km
Average Orbit Velocity
Metric: 57,052.8 km/h
Orbit Eccentricity
Orbit Inclination
0.163 degree
Mean Radius
Metric: 89.5 km
By Comparison: 97.0 x 95.0 x 77.0 km, tri-axial
Equatorial Circumference
Metric: 562.3 km
Metric: 3,003,016 km3
Metric: 1,892,818,231,001,750,000 kg
Scientific Notation: 1.8928 x 1018 kg
Metric: 0.63 g/cm3
Surface Area
Metric: 100,659.77 km2
Surface Gravity
Metric: 0.016 m/s2
Escape Velocity
Metric: 191 km/h
Rotation Period (Length of Day)
By Comparison: Synchronous with Saturn
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Last Updated: 12 Aug 2013