PLANETARY DATA: MARS

Orbital semi-major axis 1.52 A.U.
227.9 million km
Orbital eccentricity 0.093
Perihelion 1.38 A.U.
206.6 million km
Aphelion 1.67 A.U.
249.2 million km
Mean orbital speed 24.1 km/s
Sidereal orbital period 686.9 solar days
1.881 tropical years
Synodic orbital period 779.9 solar days
Orbital inclination to the ecliptic 1.85°
Greatest angular diameter, as seen from Earth 24.5"
Mass 6.42 1023 kg
0.11 (Earth = 1)
Equatorial radius 3394 km
0.53 (Earth = 1)
Mean density 3930 kg/m3
0.71 (Earth = 1)
Surface gravity 3.72 m/s2
0.38 (Earth = 1)
Escape speed 5.0 km/s
Sidereal rotation period 1.026 solar days
24h 37m
Axial tilt 23.98°
Surface magnetic field approximately 1/800
(Earth = 1)
Magnetic axis tilt relative to rotation axis
Mean surface temperature 210 K
(range 150—310 K)
Number of moons 2