Consider a binary star system that has bright lines at 656.72 and 656.86 nm. Assume that the stars are of roughly equal mass and moving in a circular orbit these spectral lines correspond to the 656.46-nm hydrogen line in the rest frame, estimate the speed V of the center of mass of the binary system which is 151 km/s how do I find the mass M of each star.

Consider a binary star system that has bright lines at 656.72 and 656.86 nm. Assume that the stars are of roughly equal mass and moving in a circular orbit these spectral lines correspond to the 656.46-nm hydrogen line in the rest frame, estimate the speed V of the center of mass of the binary system which is 151 km/s how do I find the mass M of each star.