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Mars: Moons: Phobos: Facts & Figures
Discovered By
A. Hall
Date of Discovery
1877
Average Distance from Mars
Metric:
9,378 km
Equatorial Radius
Metric:
13.4 x 11.2 x 9.2 km
Mass
Metric:
10,630,000,000,000,000 kg
Scientific Notation:
1.063 x 10
16
kg
Rotation Period (Length of Day)
1.026 Earth days
24.62 hours
By Comparison:
Synchronous with Mars
Orbit Period (Length of Year)
0.31891023 Earth days
Orbital Eccentricity
0.015
Orbital Inclination to Ecliptic
1 degree
1. Phobos
2. Deimos
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Last Updated: 09.30.03
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