# How does a star wobble due to orbiting bodies

What equations determine how a star wobbles in response to an orbiting planet, and can it be used to determine the mass of distant objects based on the wobble?

If there are other more reliable methods of determining mass than the one I am asking about here, I would appreciate a few links explaining these methods, or an explanation of those methods and their benefits/limitations.

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What constant are you talking about? You'll have to provide a formula in which this constant appears for us to be able to understand the question. – David Z May 11 '12 at 0:42
Do you means Newtonian gravity? You might want to read up on "reduced mass" in that context which will help. If your asking about measuring these things, my answer to physics.stackexchange.com/questions/22700/… is a mediocre job of explaining the work. Maybe one of the astronomers can jump in with more detail (or point us at a migrated question that already has it). – dmckee May 11 '12 at 0:47
Do I really suck that bad at asking questions. – Argus May 11 '12 at 0:56
Let me try what factors determined how a star with a common surrounding solar system lets use our system for simplicity effect the wobble of the central star again our sun for simplicity – Argus May 11 '12 at 0:58
@Argus: the "singularity" does not have a mass, neither does the "event horizon". The mass is a property of the whole system, and is only measured at infinity. Your question makes no sense, but at least now is a famous difficult question that makes no sense. The "singularity" is not a matter particle, the black hole is not a point mass surrounded by horizon, the sooner you get rid of that idea the better. – Ron Maimon May 12 '12 at 17:02