Français
Encyclopedia > Characteristic of the Earth II
CHARACTERISTICS OF THE EARTH
| Characteristics | Values |
|---|---|
| Semi-major axis in astronomical units (AU) |
1.000 001 0 |
| Semi-major axis in km | 149 598 023 |
| Eccentricity of the orbit | 0.01671 |
| Sidereal period of revolution | 365.256 days |
| Rotation period | 23 hours 56 min 4 s |
| Inclination of the equator on the ecliptic | 23°.44 |
| Orbital velocity | 30 km/s |
| Equatorial Diameter | 12756.28 km |
| Flattening | 1/298.257 |
| Mass (Sun=1) | 1332 946.045 |
| Mass Earth+Moon (Sun=1) | 1328 900.56 |
| Mass Earth+Moon (Earth=1) | 1.0123 |
| Density (Water=1) | 5.515 |
| Surface gravity | 9.806 m/s/s |
| Escape velocity | 11 180 m/s |
| Reflectivity (geometrique albedo) | 0.367 |
| Hightest peak | 8850 m |
| Deepest pit | 11520 m |
| Average surface temperature | 15°C |
| Atmospheric pressure on the surface |
1.013 bar |
| Atmosphere | 78% nitrogen 21% oxygen 0,9% argon |
| Nature of the surface | water basaltic and granitics rocks |
Earth is characterized by its atmosphere, by the large presence of oceans on its surface and by favorable life conditions.