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Solar System Exploration
Setebos: Facts & Figures
   Back to Uranus   Overview   Facts & Figures   News 
Discovered By
John J. Kavelaars, Brett Gladman, Matthew Holman, Jean-Marc Petit, and Hans Scholl
Date of Discovery
18 July 1999
Orbit Size Around Uranus (semi-major axis)
Metric: 17,420,400 km
English: 10,824,535 miles
Periapsis (closest)
Metric: 7,128,428 km
Apoapsis (farthest)
Metric: 27,712,372 km
Sidereal Orbit Period (Length of Year)
6.091937029 Earth years
2225.08 Earth days
By Comparison: Retrograde orbit
Orbit Circumference
Metric: 99,165,976.81 km
Average Orbit Velocity
Metric: 1,857.0 km/h
Orbit Eccentricity
Orbit Inclination
By Comparison: Retrograde orbit
Mean Radius
Metric: 24.0 (assuming an albedo of 0.04) km
Equatorial Circumference
Metric: 150.8 km
Metric: 57,906 km3
Metric: 86,922,769,119,637,200 kg
Scientific Notation: 8.6923 x 1016 kg
Metric: 1.5 g/cm3
Surface Area
Metric: 7,238.23 km2
Surface Gravity
Metric: 0.010 m/s2
Escape Velocity
Metric: 79 km/h

Additional Information:

-USGS Astrogeology: Gazetteer of Planetary Nomenclature:

-JPL Solar System Dynamics:

-Encyclopedia of the Solar System, second edition; edited by Lucy-Ann McFadden, Paul R. Weissman, and Torrence V. Johnson; Academic Press 2007
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Last Updated: 7 Mar 2011