Umbriel
RADIUS
545 km
MASS
1.27e+21 kg
DENSITY
1.52 (gm/cm)
GRAVITY
?
ORBIT PERIOD
4.15 (Earth days)
ROTATION PERIOD
4.15 (Earth days)
DISTANCE FROM PLANET
265,980 km
ECCENTRICITY OF ORBIT
0.0050
The surface of Umbriel is heavily cratered and is Uranus' darkest satellite.
Umbriel is named after a character in Alexander Pope's poem
The Rape of the Lock
.
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