Climate and Density Key

The density and climate files are created automatically, using the most likely combination according to existing data and formulae from GURPS Traveller: First In.

Description / Specifications

They thus may not match previously manually determined planetary densities or climates. (If it is significantly different from manually determined information, and it is desired to use the manually determined characteristics, then terraforming is likely.) The predictions are more uncertain for worlds not inhabitable without significant technological assistance (e.g., asteroid belts).

The column meanings are as follows:

• Hex: Hex number
• Name: Name of the world, with an * for Amber Zoned and ** for Red Zoned
• SAH: Size, Atmosphere, Hydrosphere from the Universal World Profile - these may have been altered for realism if the datafile was not canonical
• MSPR: Maximum Sustainable Population (without technological assistance), with the first number being for normal humans (or other beings with similar requirements) and the second being the maximum for alien races (including minor Human races).
• Gs: Most likely gravitational pull.
• APres: Most likely atmospheric pressure

• DCl: Most likely density class, from GURPS Space, in ascending order:
  • Sil - Silicate (like Pluto)
  • LIr - Low Iron (like Mars or the Moon)
  • MIr - Medium Iron (like Earth or Venus)
  • HIr - High Iron
  • Met - Metallic

• DNum: Most likely density (grams per cubic centimeter)

• Clim - Most likely climate at the 30th latitude (albeit biased toward Earth-normal), from GURPS Space and GURPS Traveller: First In - each band is at least 10 degrees Fahrenheit hotter on average from that below:
  • Torr - Torrid (too hot for human habitation without technological assistance) "Inferno world" (a type of He Hellworld)
  • VHot - Very Hot "Inferno world"
  • Hot - Hot
  • Trop - Tropical (hot + water = tropical vegetation)
  • Warm - Warm
  • Norm, Nrm-, or Nrm+ - Earth-normal; may be on the cold side (Nrm-) or hot side (Nrm+), including intermittently (e.g., ice ages) (a type of Ga Gaia world)
  • Cool - Cool
  • Chil - Chilly
  • Cold - Cold
  • Tundra - (cold + water = tundra vegetation)
  • VCld - Very Cold
  • Froz - Frozen (Ic Iceworld)
  • Frig - Frigid (too cold for human habitation without technological assistance) "Cryo world" (a type of He Hellworld)

• AU - Distance in AU of the mainworld from its (main) sun(s)
• TLk - Whether the world is likely to be tidally locked (Y), might be (?), or probably isn't (N)
• TF - How likely the world is to have been terraformed (YY indicates almost certain); note that this assumes that terraforming is done toward climatic characteristics preferred by the major races (or similar minor races)
• Ali - Whether the world is significantly more habitable by alien life, or by a highly divergent human minor race (e.g., one that is likely to be unable to reproduce with other species of Humaniti)
• SJLm - The 100D (100 diameter) limit for the star, in AU
• Star(s) - The star(s) of the world, with those in parentheses being further away from the planet; these may have been altered from those in the datafile due to either complete lack of realism (no M9 V stars exist, for instance) or bad formatting of the datafile star types