Mass (kg)............................................6.42 x 10^23
Diameter (km)........................................6787
Mean density (kg/m^3) ...............................3940
Escape velocity (m/sec)..............................5000

Average distance from Sun (AU).......................1.524
Rotation period (length of day) (in Earth days)......1.026
Revolution period (length of year) (in Earth days)...686.98

Obliquity (tilt of axis) (degrees)...................25
Orbit inclination (degrees)..........................1.85
Orbit eccentricity...................................0.093


Maximum surface temperature (K)......................240
Minimum surface temperature (K)......................190

Visual geometric albedo..............................0.15
Highest point on surface.............................Olympus Mons 
		       (about 24 km above surrounding lava plains)
Atmospheric components...............................95% carbon dioxide, 
						      3% nitrogen, 
						      1.6% argon
Surface materials....................................basaltic rock and 
				                     altered materials