Taken from Dyna Systems' EV Objects' Formulas available in the utilities section of the add-on files section of this site:
Quote
APPENDIX II: Spob types
M = Mixture? If your planet has about the same amount of land and water.
W = Water. If your planet has more water than land.
K = ???? If the world is dominated by land.
D = Desert. If your planet is totaly dominated by land and is supposed to be very hot, or Dead if your planet is just a HUGE rock
F = Frozen. If your planet is covered with ice.
T = ???? If your planet is one of those purple-green things.
G = Gas. If your planet is like Clotho II. Can be red, green and blue.
E = No idea. If your planet is really hot or just plain red.
R = Ring. If there are one or several rings around your planet.
Moons are treated the same way. You just write "(Class X moon)" instead.
Stations are treated a bit diferent. You write "(Type Y station)" and Y has to be a number. Matt Burch's already used 1-4 so it would be logical to make your station a type 5, right?
There's no real record of what these planet types mean. You might want to check out Star Trek, Star Wars etc... sites. They often deal with planet types. I'm not sure if there are any official standards for planetary types but nasa.gov may be a good place to start looking.
-AJ
EDIT:
Looks like the following site has a small list of planet class types and what to expect from them:
(url="http://"http://webhome.idirect.com/~twar/planetinfo.htm")http://webhome.idire.../planetinfo.htm(/url)
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0-60 3.0s...1320ft/9.2s...Head Gasket Bursts...
(This message has been edited by AJ (edited 01-06-2003).)