PLANETARY DATA: MOON |
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Orbital semi-major axis* | 384,000 km |
Orbital eccentricity | 0.055 |
Perigee** | 363,000 km |
Apogee*** | 406,000 km |
Mean orbital speed | 1.02 km/s |
Sidereal orbital period | 27.3 solar days |
Synodic orbital period | 29.5 solar days |
Orbital inclination to the ecliptic | 5.2° |
Greatest angular diameter, as seen from Earth | 32.9' |
Mass | 7.351022 kg 0.012 (Earth = 1) |
Equatorial radius | 1738 km 0.27 (Earth = 1) |
Mean density | 3340 kg/m3 0.61 (Earth = 1) |
Surface gravity | 1.62 m/s2 0.17 (Earth =5 1) |
Escape speed | 2.38 km/s |
Sidereal rotation period | 27.3 solar days |
Axial tilt | 6.7° |
Surface magnetic field | (no detectable field) |
Surface temperature | 100400 K |
*Closest approach to Earth
**Orbit around Earth ***Greatest distance from Earth |