Moon U2 Umbriel
|Mean diameter||1169.4 km|
|Avg. density||1.398 g/cm3|
|Equatorial surface gravity||0.228 m/s2|
|Escape velocity||0.517 km/s|
|Rotation period (sidereal)||99.460 hours|
The only close-up images of Umbriel were obtained by the Voyager 2 probe in 1986 and only 20% of surface were photographed with enough quality during fly-by. Unfortunately no other spacecraft has visited Uranus system and there are no new missions planned.
This object does not have a shape model yet and is being displayed as a textured tri-axial ellipsoid.
Textures are simple cylindrical projections with prime meridian at the middle, provided at the highest resolution available.
(JPEG, 1024×512px, 33 KB)