| 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 +
|
| Discoverer
|
Asaph Hall +
|
| 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) +
|
| Member of
|
Moon +,
Solar system +
|
| Modification dateThis property is a special property in this wiki.
|
28 August 2009 12:50:15 +
|
| Name origin
|
Greek ''deimos'' panic; attendant of Greek god of war +
|
| Orbital eccentricity
|
2.0e-4 +
|
| Orbital speed
|
1.36 km/s (4,896 km/h, 0.845 mi/s, 3,042.233 mph) +
|
| 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) +
|
| Primary
|
Mars +
|
| 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
|
0.025 m/s² (0.82 ft/s², 0.0255 g) +
|
| Visiting mission
|
Viking 1 orbiter +,
Viking 2 orbiter +,
Mars Reconnaissance Orbiter +,
Mars Excursion Rover +
|
| Categories |
Astronomy,
Solar system,
Moon,
Mars
|
