Astronomy Planets - Mars Bulk Parameters | Orbital Parameters Observational Parameters | Atmospheric Parameters Satellites   Bulk Parameters Mass 0.6419 × 1024 kg Volume 16.318 × 1010 km3 Equatorial Radius 3397 km Polar Radius 3375 km Volumetric Mean Radius 3390 km Core Radius 1700 km Ellipticity 0.0065 Mean Density 3933 kg m-3 Surface Gravity 3.69 m s-2 Escape Velocity 5.03 km s-1 GM 0.04283 × 106 km3 s-2 Bond Albedo 0.16 Visual Geometric Albedo 0.150 Visual Magnitude -1.52 Solar Irradiance 595 W m-2 Black-Body Temperature 216.6 K Moment of Inertia 0.366 I MR-2 Topographic Range 36 km Orbital Parameters Semimajor Axis 227.9 × 106 km Sidereal Orbit Period 686.980 days Tropical Orbit Period 686.930 days Perihelion 206.6 × 106 km Aphelion 249.3 × 106 km Synodic Period 779.94 days Mean Orbital Velocity 24.13 km s-1 Orbital Inclination 1.85 ° Orbital Eccentricity 0.0934 Sidereal Rotation Period 24.6229 hours Obliquity to Orbit 25.19 ° Observational Parameters Maximum Apparent Diameter from Earth 25.7 arc seconds Minimum Apparent Diameter from Earth 3.5 arc seconds Maximum Distance from Earth 401.3 × 106 km Minimum Distance from Earth 54.5 × 106 km Apparent Magnitude near Opposition -2.0 Atmospheric Parameters Surface Pressure 6.9 mbars to 9 mbars Surface Density 0.020 kg m-3 Scale Height 11.1 km Average Temperature 210 K Diurnal Temperature Range 184 K to 242 K Surface Wind Speeds - Autumn 2 to 4 m s-1 Surface Wind Speeds - Summer 5 to 10 m s-1 Surface Wind Speeds - Dust Storm 17 to 30 m s-1 Mean Molecular Weight 43.34 g mol-1 Carbon Dioxide CO2 95.32% Nitrogen N2 2.7% Argon Ar 1.6% Oxygen O2 0.13% Carbon Monoxide CO 0.08% Water H2O 210 ppm Nitrogen Oside NO 100 ppm Neon Ne 2.5 ppm HDO 0.85 ppm Krypton Kr 0.3 ppm Xenon Xe 0.08 ppm Satellites Phobos Deimos

Page compiled: Wed Sep 05 18:37:58 GMT+01:00 2001