492-7 - , Ar Surface Gravity (Earth = 1) 0.38 1.0 Surface...

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ES 492 Lecture Notes 7: Mars Property Mars Earth Avg. distance from sun (AU) 1.524 1.00 Avg. orbital speed (km/s) 24.1 29.79 Orbital eccentricity 0.093 0.017 Period for revolution (days) 686.98 365.256 Period for rotation (days) 1.0 day 37 min 22 sec 1.0 Orbital inclination (degrees) 1.85 0.0 Axial obliquity/tilt (degrees) 25.19 23.45 Escape velocity (km/s) 5.0 11.2 Property Mars Earth Radius (km) 3,394 6,378 Mass (kg) 6.42 x 10 23 5.974 x 10 24 Bulk Density (g/cm 3 ) 3.924 5.515 Volume (km 3 ) 1.636 x 10 11 10.86 x 10 11 Albedo (%) 15 39 Atmosphere CO 2 , N 2 N 2 , O 2
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Unformatted text preview: , Ar Surface Gravity (Earth = 1) 0.38 1.0 Surface Pressure (atmospheres) 0.01 1.0 Average surface temp (C)-53 9 Surface material ig., sed rocks, regolith ig., sed. rocks, water, soil Number of moons 2 1 Crust and Mantle Composition (%) Core Composition (%) Elements Mars Earth MgO 30.2 35.1 Al 2 O 3 3.02 3.64 CaO 2.45 2.89 SiO 2 44.4 49.9 TiO 2 0.14 0.16 FeO 17.9 8.0 Na 2 O 0.50 0.34 K 2 O 0.038 0.02 P 2 O 5 0.16 -- Cr 2 O 3 0.76 -- Elements Mars Earth Fe 77.8 90.6 Ni 7.6 7.9 Co 0.36 0.5 S 14.24 0.7 P -- 0.2 C -- 0.4...
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This note was uploaded on 02/05/2012 for the course ES 492 taught by Professor Staff during the Summer '11 term at S. Alabama.

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492-7 - , Ar Surface Gravity (Earth = 1) 0.38 1.0 Surface...

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