Mass (kg)............................................ 8.68 x 10^25 Diameter ............................................ 31,763 mi. (51,118 km.) Mean density (kg/m^3) ............................... 1290 Escape velocity (m/sec).............................. 21300
Distance from the sun ............................... Shortest-1,702,100,000 mi.(2,739,300,000 km.) Greatest-1,870,800,000 mi.(3,010,700,000 km.) Mean-1,786,400,000 mi.(2,875,000,000 km.) Rotation period (length of day in Earth hours)....... 17.9 Revolution period (length of year in Earth years).... 84 or 30,685 earth-days
Obliquity (tilt of axis in degrees).................. 97.9 Orbit inclination (degrees).......................... 0.77 Orbit eccentricity (deviation from circular)......... 0.047
Mean surface temperature (Farenheit)................ -357 (-216 C)
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.
Number of Satellites ................................15