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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