Muin Phobos
Phobos (seestematic designation: Mars I) is the lairger an closer o the twa naitural satellites o Maurs.
Baith muins wur discovered in 1877.
 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 | |
Alternative names | Mars I |
| Adjectives | Phobian |
| Orbital chairactereestics | |
| Epoch J2000 | |
| Periapsis | 9234.42 km |
| Apoapsis | 9517.58 km |
| 9376 km | |
| Eccentricity | 0.0151 |
Orbital period | 0.31891023 d (7 h 39.2 min) |
Average orbital speed | 2.138 km/s |
| 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 |
Mean radius | 11.2667 km (1.76941 mYirds) |
Surface area | 1548.3 km2 (3.03545 µYirds) |
| Vollum | 5783.61 km3 (5.33933 nYirds) |
| Mass | 1.0659×1016 kg (1.78477 nEarths) |
Mean density | 1.876 g/cm3 |
Surface gravity | 0.0057 m/s2 (581.4 µg) |
Escape velocity | 11.39 m/s (41 km/h) |
| Synchronous | |
Equatorial rotation velocity | 11.0 km/h (6.8 mph) (at langest axis) |
Axial tilt | 0° |
| Albedo | 0.071 |
| Temperatur | ≈ 233 K |
Apparent magnitude | 11.3 |
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References
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