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There is some simple back-of-the envelope reverse-engineering which might be worth sharing: The following Wikipedia quote gives an approximate of the overall mass of the Milky way: In March 2019, astronomers reported that the mass of the Milky Way galaxy is 1.5 trillion solar masses within a radius of about 129,000 light-years, over twice as much as was ...


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There are several corrections here, and as you suspect, all of them can be done in astropy. You'll need to do something like this: Transform your observed velocity to the solar system barycenter (thus correcting for Earth's rotation on its axis, and its orbit around the Sun. There is an example here in the astropy docs that shows how to do that. If you ...


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