How much gas can my planet retain in its atmosphere, based on its mass?
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My planet Jasmi is 0.602 MEarth and, according to the wonderful u/shagomir's Planet Calculator Pro spreadsheet, I need to retain enough gas for just over 5 atm of pressure at sea level for a suitable greenhouse effect for habitability.
My atmospheric composition and pressure are as follows:
5.16 atm
74.4% H2O
19.83% N2
3.20% O2
1.38% CH4
0.83% Ne
0.11% Ar
0.11% CO2
0.09% Kr
0.04% He
Is this even possible with a planet as small as mine? My radius is .870 REarth so my gravity is about 0.8 g.
This post was sourced from https://worldbuilding.stackexchange.com/q/105467. It is licensed under CC BY-SA 3.0.
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