作词 : Cretu (m.cretu.) . Closest approach to earth 34,600,000 miles Mean distance from the sun 141,600,000 miles Period of rotation around the sun ************ Sidereal 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 Official magnitude at opposition -2.01 Mass 0.01017 Density 3.5 Latin 'o fortuna Velut luna' Statu variabilis, (translation: 'o fortune Like the moon' You are changeable, ) Diameter 0.532 Inclination for equator 24.936 degrees Gravitational escape velocity 3121 miles per hour Inclination from equator