Mars Diameter.... 6,787 km Mass (Earth = 1).... 0.11 Distance in AU's from sun.... 1.52 Rotation period (length of day in Earth days).... 1.0 Revolution period (length of year in Earth days).... 687.0 Mean surface temperature.... -55.0 (C) ... -67.0 (F) Number of moons.... 2 Light minutes from Sun.... 12.7 Light hours from Sun.... 0.21 Photo source:  Space Telescope Science Institute  (Hubble) See credits for original photo information