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Suppose a binary in an eccentric orbit with masses m1and m2. Derive the Kepler’s 3rd law...

Suppose a binary in an eccentric orbit with masses m1and m2.
Derive the Kepler’s 3rd law for this eccentric orbit .
Express the Kepler’s law in terms of the orbital period T and separation a between the two stars and eccentricity e.

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Here T=P

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