Let, consider as a system the Sun with Saturn in a circular orbit around it. Determine the magnitude of the change in the velocity of the Sun relative to center of mass of the system throughout the time Saturn completes half an orbit. Suppose that the mass of the Sun is 5.68 x10^29 kg, the mass of Saturn is 5.68 x10^26 kg, its period is 9.29 x10^8 s, and the radius of the orbit is 1.43 x 10^12 m. Avoid the influence of other celestial objects.