You can determine the mass of something by measuring the time it takes for an or... | Hacker News

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		saagarjha on July 24, 2024 \| parent \| context \| favorite \| on: Another intermediate-mass black hole discovered at... You can determine the mass of something by measuring the time it takes for an orbit around it, yes.

andrewflnr on July 25, 2024 [–]

You need the orbital radius, too.

saagarjha on July 25, 2024 | [–]

Yep. You can get both from observations of the orbiting object.

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