# Velocity of the object in Binary system how to i can calculate the velocity of the object? If i know the distance of the object from the center of mass, and i know distance between the two (identical) ellipse center... (the two object has the same mass) and of course we know the ellipses semi-major and -minor axis

• You will need some more information, eg a point in the orbit. But the generalized problem is converting Kelperian elements to position and velocity. Search for that, and you should find some good explanations. Mar 18 at 22:37
• One of the most useful equations in orbital mechanics is the vis-viva equation Also, see answer(s) to Orbital speeds of Components of Binary System
– uhoh
Mar 19 at 0:14
• I want to know the values of orbital parameters that make siuch system stable. Mar 19 at 1:09
• The orbit is stable if the sum of potential & kinetic energies is negative. See en.wikipedia.org/wiki/Specific_orbital_energy which is linked from the vis-viva article. Mar 19 at 5:23
• You had a possibly acceptable answer that was deleted because your question is confusing. Do you want the velocity (title) or the speed? If there are additional requirements then put them in the question, not in comments. Mar 19 at 6:21