bmabtang@pacbell.net
For all you people out there needing information on Planet Mercury: for reports, research, or just personal enrichment, here's a short list of vital statistics on the first planet from the sun. Hope it can be of help to you all. Smile ^_^ p.s. The planet is grey... not blue. :P
Mass (kg) ............................... 3.303e+23
Mass (Earth = 1) ....................... 5.5271e-02
Equatorial radius (km) .................... 2,439.7
Equatorial radius (Earth = 1) .......... 3.8252e-01
Mean density (gm/cm^3) ....................... 5.42
Mean distance from the Sun (km) ........ 57,910,000
Mean distance from the Sun (Earth = 1) ..... 0.3871
Rotational period (days) .................. 58.6462
Orbital period (days) ...................... 87.969
Mean orbital velocity (km/sec) .............. 47.88
Orbital eccentricity ....................... 0.2056
Tilt of axis ................................. 0.00°
Orbital inclination ......................... 7.004°
Equatorial surface gravity (m/sec^2) ......... 2.78
Equatorial escape velocity (km/sec) .......... 4.25
Visual geometric albedo ...................... 0.10
Magnitude (Vo) ............................... -1.9
Mean surface temperature .................... 179°C
Maximum surface temperature ................. 427°C
Minimum surface temperature ................ -173°C
Atmospheric composition
Helium .................................... 42%
Sodium .................................... 42%
Oxygen .................................... 15%
Other ...................................... 1%
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