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Mars: Moons: Deimos: Facts & Figures
Discovered By
A. Hall
Date of Discovery
1877
Average Distance from Mars
Metric:
23,459 km
Equatorial Radius
Metric:
7.5 x 6.1 x 5.2 km
Mass
Metric:
2,380,000,000,000,000 kg
Scientific Notation:
2.38 x 10
15
kg
Rotation Period (Length of Day)
1.026 Earth days
24.62 hours
By Comparison:
Synchronous with Mars
Sidereal Orbit Period (Length of Year)
1.2624407 Earth days
Orbital Eccentricity
0.0005
Orbital Inclination to Ecliptic
0.9 - 2.7 degrees
1. Phobos
2. Deimos
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Last Updated: 30 Sep 2003
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