Closest approach to earth 34,600,000 miles Mean distance from the sun 141,600,000 miles Mean distance from the sun 141,600,000 miles Period of rotation around the sun 1.88089 years Sideral rotation period 24 hours,37 minutes, 22.66 seconds Mean surface atmospheric temperature -23 degrees Visual albedo 0.159 Pole Star BD 52 Degrees 2880 Visual magnitude at mean opposition -2.01 Mass 0.10174 density 3.93 "O Fortuna velut Luna" statu variabilis, "O Fortune like the Moon" you are changeable, diameter 0.532 Inclination of equator to orbit 24.936 degrees gravitational escape velocity 3.121 miles per hour inclination_