National Aeronautics and Space Administration Logo
Follow this link to skip to the main content NASA Banner
Solar System Exploration
Cressida: Facts & Figures
   Back to Uranus   Overview   Gallery   Facts & Figures   News 
Discovered By
Voyager 2
Date of Discovery
9 January 1986
Orbit Size Around Uranus (semi-major axis)
Metric: 61,800 km
English: 38,401 miles
Periapsis (closest)
Metric: 61,775 km
Apoapsis (farthest)
Metric: 61,825 km
Sidereal Orbit Period (Length of Year)
0.001270363 Earth years
0.464 Earth days
Orbit Circumference
Metric: 388,300.84 km
Average Orbit Velocity
Metric: 34,869.0 km/h
Orbit Eccentricity
Orbit Inclination
Mean Radius
Metric: 39.8 km
Equatorial Circumference
Metric: 250.1 km
Metric: 264,081 km3
Metric: 343,195,071,179,257,000 kg
Scientific Notation: 3.4320 x 1017 kg
Metric: 1.3 g/cm3
Surface Area
Metric: 19,905.63 km2
Surface Gravity
Metric: 0.014 m/s2
Escape Velocity
Metric: 122 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
Awards and Recognition   Solar System Exploration Roadmap   Contact Us   Site Map   Print This Page
NASA Official: Kristen Erickson
Advisory: Dr. James Green, Director of Planetary Science
Outreach Manager: Alice Wessen
Curator/Editor: Phil Davis
Science Writers: Courtney O'Connor and Bill Dunford
Producer: Greg Baerg
Webmaster: David Martin
> NASA Science Mission Directorate
> Budgets, Strategic Plans and Accountability Reports
> Equal Employment Opportunity Data
   Posted Pursuant to the No Fear Act
> Information-Dissemination Policies and Inventories
> Freedom of Information Act
> Privacy Policy & Important Notices
> Inspector General Hotline
> Office of the Inspector General
> NASA Communications Policy
> NASA Advisory Council
> Open Government at NASA
Last Updated: 12 Aug 2013