The mass enclosed in any orbit can be estimated from the equation m(

in general the largest mass M is located at the origin of the coordinate system.

Explanation:

The law of universal gravitation is

            F = G m M / r2

Newton's second law is

           F = m a

Where the acceleration is centripetal

          a = v² / r

Let's replace

           G m M / r² = m v² / r

           M = v² r / G

The value of r is the distance between the two masses in interest, in general the largest mass M is located at the origin of the coordinate system.

This is because the body with more mass moves less than the body

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