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
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
Diameter:
0.532