Appendix 1c: Solar System Data 3
Note: This data has been compiled from somewhat less reliable sources;
do not use for life-critical applications!
Miscellaneous Data
Gravity Esc vel M.O.V Axial Ascend Peri- Equilib Surface Press Atmospheric
Name (g) (km/s) (km/s) incl Oblate node helion (K) (K) (atm) Composition
--------- ------- ------- ------ ------ ------ ------ ------ ------- ------- ------ -----------
Mercury 0.378 4.25 47.87 0 48.35 77.44 449 440 0 --
Venus 0.905 10.36 35.02 177.36 76.72 131.56 328 730 93 CO2, N2
Earth 1.000 11.18 29.79 23.45 .00335 354.90 102.83 279 287 1 N2, O2, Ar
Mars 0.379 5.02 24.13 25.19 .00519 49.60 335.99 226 218 0.007 CO2, N2, Ar
Jupiter 2.529 59.56 13.06 3.13 .06481 100.47 15.63 122 120 (x) H2, He
Saturn 1.066 35.49 9.66 26.73 .1076 113.71 92.80 90 88 H2, He
Uranus 0.903 21.30 6.80 97.86 .030 74.06 176.29 64 59 H2, He, CH4
Neptune 1.096 23.50 5.44 29.60 .026 131.81 1.95 51 48 H2, He, CH4
Pluto 0.069 1.22 4.74 122.52 110.42 224.59 44 37 1e-5 N2, CH4, CO
Key:
Gravity Surface gravity in g's
Esc vel Escape velocity in kilometers per second
M.O.V. Mean Orbital Velocity in kilometers per second
Axial incl Inclination of the rotation axis in degrees (obliquity)
Oblate Oblateness
Ascend Longitude of the ascending node
Perihelion Longitude of perihelion
Equilib Equlibrium temperature in Kelvins
Surface Surface temperature in Kelvins
Press Surface pressure in atmospheres
Notes:
(x) for the jovian planets "surface" refers to the cloud tops or 1 bar level
Much more accurate and detailed data is available from JPL's Horizons telnet interface
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Bill Arnett; last updated:
1997 May 22