| Albedo
|
0.071 +
|
| Apoapsis
|
9,519.61 km (6.36347e-5 AU, 5,915.211 mi) +
|
| Axial tilt
|
0 rad (0 °, 0 grad) +
|
| Color
|
#999999 +
|
| Composition
|
Rock and ice mix +
|
| Date of discovery
|
18 August 1877 +
|
| Discoverer
|
Asaph Hall +
|
| Escape speed
|
0.0114 km/s (41.04 km/h, 0.00708 mi/s, 25.501 mph) +
|
| Inclination
|
0.0191 rad (1.093 °, 1.214 grad) +
|
| Lunar mass
|
1.073e+16 kg (1.4602e-7 M☾, 1.79552e-9 M⊕) +
|
| Lunar surface area
|
2,997 km² (1,157.148 mi², 7.90369e-5 A☾, 5.87564e-6 A⊕) +
|
| Maximum temperature
|
269 K (-4.15 °C, 24.53 °F, 484.2 °R) +
|
| Mean radius
|
11.1 km (6.897 mi) +
|
| Mean temperature
|
233 K (-40.15 °C, -40.27 °F, 419.4 °R) +
|
| Member of
|
Moon +,
Solar system +
|
| Minimum temperature
|
161 K (-112.15 °C, -169.87 °F, 289.8 °R) +
|
| Orbital eccentricity
|
0.0151 +
|
| Orbital speed
|
2.138 km/s (7,696.8 km/h, 1.328 mi/s, 4,782.57 mph) +
|
| Order
|
1 +
|
| Periapsis
|
9,236.39 km (6.17415e-5 AU, 5,739.227 mi) +
|
| Planet density
|
1,872 kg/m³ (1.872 g/ml, 116.865 lb/ft³) +
|
| Primary
|
Mars +
|
| Rotation speed
|
0.00306 km/s (11 km/h, 0.0019 mi/s, 6.835 mph) +
|
| Semi-major axis
|
9,378 km (6.26881e-5 AU, 5,827.219 mi) +
|
| Sidereal day
|
7.654 h (0.319 da) +
|
| Sidereal period
|
0.319 da (8.73101e-4 a) +
|
| Surface gravity
|
0.00581 m/s² (0.0191 ft/s², 5.92455e-4 g) +
|
| Synodic period
|
0.319 da (8.73648e-4 a) +
|
| Visiting mission
|
Viking 1 orbiter +,
Mars Express +
|
| Categories |
Astronomy +,
Solar system +,
Moon +,
Mars +
|
