Planet Profile Mercury

Mass (kg)...................................................................3.3 x 10^23
Diameter (km).......................................................................4878
Mean density (kg/m^3) .......................................................5420
Escape velocity (m/sec).....................................................4300
Average distance from Sun (AU)....................................0.387
Rotation period (length of day) (in Earth days)...........58.65
Revolution period (length of year) (in Earth days).....87.97
Obliquity (tilt of axis) (degrees)................................................0
Orbit inclination (degrees).........................................................7
Orbit eccentricity..................................................................0.206
Mean surface temperature (K)............................................452
Maximum surface temperature (K)....................................700
Minimum surface temperature (K).....................................100
Visual geometric albedo....................................................0.12

Largest known surface feature.................Caloris Basin (1350 km diameter)
Atmospheric components..............trace amounts of hydrogen and helium
Surface materials......................basaltic and anorthositic rocks and regolith