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leonne

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## Homework Statement

One of the most massive binary star systems known is called WR-20a and is located

in the Large Magellanic Cloud (a small companion galaxy to the Milky Way). This

system is nearly edge on, and the stars are moving in circular orbits with observed

speeds of 362.2 km s^-1 and 366.4 km s^-1 in an orbital period of just 3.686 days!

Calculate the masses of these two stars

What is the distance between the two stars?

## Homework Equations

Vn=(2pie*an)/p ,p^2=(4pie^2 /G(m1+m2)) A^3

A=a1+a2

## The Attempt at a Solution

I am thinking of using vn=... and solving for a using keplers 3rd law to find I can find the center of mass of the two star but not sure how i would find the mass of the individual star, or am i using the wrong formulas?

for the other part would i use @=r/d were r =(a(1-e))/1+ecos e would be 1 because its a circular orbit right?

But not sure what @ would be the angular distance or i use some other formula?

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