Hubble's close encounter with Mars
Facts about Mars
| Orbit | 227 940 000 km (1.52 AU) mean distance from Sun |
| Diameter | 6794 km |
| Martian day (sol) | 24 hours, 37 mins 22 seconds |
| Martian year | 669 Martian days (sols), 687 Earth days |
| Average temperature | 218 K (-55 degrees C) |
| Minimum temperature | 140K (-133 degrees C) (winter pole) |
| Maximum temperature | 300K (27 degrees C) (summer dayside) |
| Surface area | 144 x 106 km2, about the same as the land area of Earth |
| Atmospheric pressure at surface | 6.35 mbar, that is less than one hundredth Earth's atmospheric pressure. |
| Atmospheric composition | 95.32% carbon dioxide, 2.7% nitrogen, 1.6% argon, 0.13% oxygen |
| Moons |
Phobos - diameter 22 km, orbit 5981 km from surface Deimos - diameter 12 km, orbit 20,062 km |
Last update: 19 November 2004
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