Characteristics |
Value |
Orbital period |
365.256363004 days |
Average orbital speed |
29.78 km/s(107200 km/h) |
Mean sidereal day |
23 hours, 56 minutes, 4.0916 seconds. |
Mean radius |
6371.0 km |
Equatorialradius |
6378.1 km |
Polarradius |
6356.8 km |
Circumference |
40075.017 km (equatorial) 40007.86 km (meridional) |
Surface area |
510072000 km2 148940000 km2 (29.2%) land 361132000 km2 (70.8%) water |
Volume |
1.08321×1012 km3 |
Mass |
5.97219×1024 kg(3.0×10-6solar mass) |
Mean density |
5.514 g/cm3 |
Surface gravity |
9.807 m/s2 |
Escape velocity |
11.186 km/s |
Sidereal rotation period |
0.99726968 d(23h 56m 4.100s) |
Equatorial rotation velocity |
1,674.4 km/h (465.1 m/s) |
Axial tilt |
23 degrees 26 min 21.4119 sec. |
Surface pressure |
101.325 kPa(at MSL) |
Atmospheric Composition by volume |
78.08% nitrogen(N2)(dry air) 20.95% oxygen(O2) 0.930% argon 0.039% carbon dioxide ~ 1% water vapor (climate-variable) |