Mars + Satellite
| Deimos |
Albedo
0.068
Apoapsis
23,465 km (1.56854e-4 AU, 14,580.475 mi)
Axial tilt
0 rad (0 °, 0 grad)
Color
#999999
Composition
Rock and ice mix
Date of discovery
12 August 1877
Escape speed
0.0056 km/s (20.16 km/h, 0.00348 mi/s, 12.527 mph)
Inclination
0.0314 rad (1.8 °, 2 grad)
Lunar mass
1.4e+15 kg (1.9052e-8 M☾, 2.34271e-10 M⊕)
Lunar surface area
480 km² (185.329 mi², 1.26586e-5 A☾, 9.41044e-7 A⊕)
Mean radius
6.2 km (3.853 mi)
Mean temperature
233 K (-40.15 °C, -40.27 °F, 419.4 °R)
Orbital eccentricity
2.0e-4
Orbital speed
1 ,36 km/s
Order
2
Periapsis
23,455 km (1.56787e-4 AU, 14,574.261 mi)
Planet density
1,471 kg/m³ (1.471 g/ml, 91.832 lb/ft³)
Rotation speed
3.75e-4 km/s (1.35 km/h, 2.33014e-4 mi/s, 0.839 mph)
Semi-major axis
23,460 km (1.5682e-4 AU, 14,577.368 mi)
Sidereal day
24.624 h (1.026 da)
Sidereal period
1.262 da (0.00346 a)
Surface gravity
0.0025 m/s² (0.0082 ft/s², 2.54929e-4 g)
Discoverer
Asaph Hall +
Member of
Moon +
Primary
Mars +
Categories Astronomy +, Mars +, Moon +, Solar system +
|
