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SSE Home  >  Planets  >  Saturn  >  Moons  >  Tethys  >  Facts & Figures 
Tethys: Facts & Figures
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Discovered By
G.D. Cassini
Date of Discovery
1684
Orbit Size Around Saturn (semi-major axis)
Metric: 294,672 km
English: 183,101 miles
Periapsis (closest)
Metric: 294,643 km
Apoapsis (farthest)
Metric: 294,701 km
Sidereal Orbit Period (Length of Year)
1.888 Earth days
Orbit Circumference
Metric: 1,851,478.78 km
Average Orbit Velocity
Metric: 40,860.7 km/h
Orbit Eccentricity
0.0001
Orbit Inclination
1.091 degrees
Mean Radius
Metric: 533.0 km
By Comparison: 535.6 x 528.2 x 525.8 km, tri-axial
Equatorial Circumference
Metric: 3,348.9 km
Volume
Metric: 634,264,255 km3
Mass
Metric: 617,551,805,221,061,000,000 kg
Scientific Notation: 6.1755 x 1020 kg
Density
Metric: 0.973 g/cm3
Surface Area
Metric: 3,569,967.66 km2
Surface Gravity
Metric: 0.145 m/s2
Escape Velocity
Metric: 0.39321974 km/h
Sidereal Rotation Period (Length of Day)
By Comparison: Synchronous with orbital period
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Last Updated: 31 Mar 2011