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Uranus from the Hubble Space Telescope


Planet Profile

Mass (kg)                                                   8.68 x 10^25

Diameter (km)                                                    51118

Mean density (kg/m^3)                                          1290

Escape velocity (m/sec)                                      21300

Average distance from Sun (AU)                            19.18

Rotation period (length of day in Earth hours)         17.9

Revolution period (length of year in Earth years)        84

Obliquity (tilt of axis in degrees)                            97.9

Orbit inclination (degrees)                                     0.77

Orbit eccentricity (deviation from circular)            0.047

Mean temperature (K)                                               59

Visual geometric albedo (reflectivity)                      0.56

Atmospheric components:    83% hydrogen, 15% helium, 2% methane (at depth)

Rings:    Uranus has a system of narrow, faint rings. Ring particles are dark, and could consist of rocky or carbonaceous material.


More information about Uranus can be found by clicking here.