Phobos (muin)
Appearance
Enhanced-colour image o Phobos—Stickney crater is on the richt (MRO, 23 Mairch 2008). Image: NASA/JPL/Varsity o Arizona | |
Discovery | |
---|---|
Discovered bi | Asaph Hall |
Discovery date | 18 August 1877 |
Designations | |
Mars I | |
Adjectives | Phobian |
Orbital chairactereestics | |
Epoch J2000 | |
Periapsis | 234.42 km 9[1] |
Apoapsis | 517.58 km 9[1] |
9376 km[1] | |
Eccentricity | 0.0151[1] |
91023 d 0.318 (7 h 39.2 min) | |
Average orbital speed | 2.138 km/s[1] |
Inclination | 1.093° (tae Mars's equator) 0.046° (tae local Laplace plane) 26.04° (tae the ecliptic) |
Satellite o | Maurs |
Pheesical chairacteristics | |
Dimensions | 27 × 22 × 18 km[1] |
Mean radius | 11.2667 km (41 mYirds) 1.769 |
Surface area | 548.3 km2 1[1] (3.03545 µYirds) |
Vollum | 783.61 km3 5 (33 nYirds) 5.339 |
Mass | ×1016 kg 1.0659[1] (77 nEarths) 1.784 |
Mean density | 1.876 g/cm3[1] |
0.0057 m/s2[1] (581.4 µg) | |
11.39 m/s (41 km/h)[1] | |
Synchronous | |
Equatorial rotation velocity | 11.0 km/h (6.8 mph) (at langest axis) |
0° | |
Albedo | 0.071[2] |
Temperatur | ≈ 233 K |
11.3[3] | |
Phobos (seestematic designation: Mars I) is the lairger an closer o the twa naitural satellites o Maurs. Baith muins wur discovered in 1877.
References
[eedit | eedit soorce]- ↑ a b c d e f g h i j k "Mars: Moons: Phobos". NASA Solar System Exploration. 30 September 2003. Archived frae the original on 19 October 2013. Retrieved 2 December 2013.
- ↑ "Planetary Satellite Physical Parameters". JPL (Solar System Dynamics). 13 Julie 2006. Retrieved 29 Januar 2008.
- ↑ "Classic Satellites of the Solar System". Observatorio ARVAL. Retrieved 28 September 2007.