Monday, January 16, 2006


Mass (kg): 6.42 x 1023
Diameter (km): 6787
Mean density (kg/m3): 3940
Escape velocity (m/s): 5000
Average distance from Sun: 1.524 AU (227,936,640 km)
Rotation period (length of day in Earth days): 24.6
Revolution period (length of year in Earth days): 686.98
Obliquity (tilt of axis degrees): 25
Orbit inclination (degrees): 1.85
Orbit eccentricity (deviation from circular): 0.093
Maximum surface temperature (K): 310 (37oC)
Minimum surface temperature (K): 150 (-123 oC)
Satellites: Two Visual geometric albedo: (reflectivity) 0.15
Highest point on surface: Olympus Mons (about 24 km above surrounding lava plains)
Atmospheric components: 95% carbon dioxide (CO2), 3% nitrogen (N), 1.6% argon (Ar)
Surface materials: basaltic rock and altered materials


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