| Mars Statistics
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| Mass (kg) | 6.421e+23
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| Mass (Earth = 1) | 1.0745e-01
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| Equatorial radius (km) | 3,397.2
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| Equatorial radius (Earth = 1) | 5.3264e-01
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| Mean density (gm/cm^3) | 3.94
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| Mean distance from the Sun (km) | 227,940,000
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| Mean distance from the Sun (Earth = 1) | 1.5237
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| Rotational period (hours) | 24.6229
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| Rotational period (days) | 1.025957
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| Orbital period (days) | 686.98
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| Mean orbital velocity (km/sec) | 24.13
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| Orbital eccentricity | 0.0934
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| Tilt of axis (degrees) | 25.19
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| Orbital inclination (degrees) | 1.850
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| Equatorial surface gravity (m/sec^2) | 3.72
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| Equatorial escape velocity (km/sec) | 5.02
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| Visual geometric albedo | 0.15
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| Magnitude (Vo) | -2.01
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| Minimum surface temperature | -140°C
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| Mean surface temperature | -63°C
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| Maximum surface temperature | 20°C
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| Atmospheric pressure (bars) | 0.007
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Atmospheric composition
Carbon Dioxide (C02)Nitrogen (N2)Argon (Ar)
Oxygen (O2)Carbon Monoxide (CO)Water (H2O)Neon (Ne)
Krypton (Kr)Xenon (Xe)Ozone (O3)
95.32%
2.7%
1.6%
0.13%
0.07%
0.03%
0.00025%
0.00003%
0.000008%
0.000003%
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| Moon | # | Radius
(km) | Mass
(kg) | Distance
(km) | Discoverer | Date
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| Phobos | I | 13.5x10.8x9.4 | 1.08e+16 | 9,380 | A. Hall | 1877
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| Deimos | II | 7.5x6.1x5.5 | 1.80e+15 | 23,460 | A. Hall | 1877
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Mars Data Aquired From Views of the Solar System
by Calvin J. Hamilton
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