Closest approach to Earth 34,600,000 miles Mean distance from the Sun 141,600,000 miles Period of rotation around the Sun 1.88089 years Citerial 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 position -2.01 Mass 0.10174 Density 3.95 Diameter 0.532 Inclination of equator 24.936 degrees Gravitational escape velocity 3121 miles inclination...