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Bianca: Facts & Figures
   Back to Uranus   Overview   Gallery   Facts & Figures   News 
Discovered By
Voyager 2
Date of Discovery
23 January 1986
Orbit Size Around Uranus (semi-major axis)
Metric: 59,200 km
English: 36,785 miles
Periapsis (closest)
Metric: 59,147 km
Apoapsis (farthest)
Metric: 59,253 km
Sidereal Orbit Period (Length of Year)
0.001190965 Earth years
0.435 Earth days
Orbit Circumference
Metric: 371,964.49 km
Average Orbit Velocity
Metric: 35,628.8 km/h
Orbit Eccentricity
Equatorial Inclination to Orbit
Mean Radius
Metric: 25.7 ± 2 (assuming albedo of 0.07) km
English: 16.0 ± 1 (assuming albedo of 0.07) miles
Equatorial Circumference
Metric: 161.5 km
Metric: 71,103 km3
Metric: 92,917,442,852,026,000 kg
Scientific Notation: 9.2917 x 1016 kg
Metric: 1.3 g/cm3
Surface Area
Metric: 8,299.96 km2
Surface Gravity
Metric: 0.009 m/s2
Escape Velocity
Metric: 79 km/h
Rotation Period (Length of Day)
0.435 hours

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

-Dr. Ellis Miner, retired planetary scientist, Jet Propulsion Laboratory
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Last Updated: 12 Aug 2013