Oberon (GIF, 167K)

Uranus IV

Oberon [O-buh-ron] is a moon of Uranus that is characterized by an old, heavily cratered, and icy surface. The surface shows little evidence of internal activity other than some unknown dark material that apparently covers the floors of many craters. The above image shows several large impact craters towards the center of the image. On the limb, a high mountain rises 6 kilometers (4 miles) above its surroundings. There are bright rays similar to those seen on Jupiter's moon Callisto.

Oberon Statistics

Discovered by .............................. William Herschel
Date of discovery ...................................... 1787

Mass (kg) .......................................... 3.03e+21
Mass (Earth = 1) ................................. 5.0703e-04
Equatorial radius (km) ................................ 761.4
Equatorial radius (Earth = 1) .................... 1.1938e-01
Mean density (gm/cm^3) ................................. 1.64

Mean distance from Uranus (km) ...................... 582,600
Rotational period (days) ........................... 13.46324
Orbital period (days) .............................. 13.46324
Mean orbital velocity (km/sec) ......................... 3.15

Orbital eccentricity ................................. 0.0008
Orbital inclination .................................... 0.10°

Escape velocity (km/sec) .............................. 0.729

Visual geometric albedo ................................ 0.24
Magnitude (Vo) ........................................ 13.94

Uranus Titania

Author: Calvin J. Hamilton.