Uranus Diameter.... 51,118 km Mass (Earth = 1).... 14.5 Distance in AU's from sun.... 19.2 Rotation period (length of day in Earth hours).... 17.9 Revolution period (length of year in Earth years).... 84 Mean surface temperature.... -214.0 (C) ... -353.0 (F) Number of Moons.... 15 Light minutes from Sun.... 151.4 Light hours from Sun.... 2.52 Photo source: NASA'S Planetary PhotoJournal See credits for original photo information