Earth: Planet Profile

Mass (kg) 5.98 x 1024
Diameter (km) 12756
Mean density (kg/m3) 5520
Escape velocity (m/s) 11200
Average distance from Sun 1 AU (149,597,890 km)
Rotation period (length of day in Earth days) 1 (23.93 hours)
Revolution period (length of year in Earth days) 365.26
Obliquity (tilt of axis degrees) 23.4
Orbit inclination (degrees) 0
Orbit eccentricity (deviation from circular) 0.017
Mean surface temperature (K) 281
Mean maximum surface temperature (K) 310
Mean minimum surface temperature (K) 260
Visual geometric albedo (reflectivity) 0.39
Highest point on surface Mount Everest
(over 8 km above sea-level)
Atmospheric components 78% nitrogen,
21% oxygen,
1% argon
Surface materials basaltic and granitic rock and altered materials