Comic-strip hero Superman meets an asteroid in outer space, and hurls it at 950 m/s, as fast as a bullet. The?

asteroid is two thousand times more massive than Superman. In the strip, Superman is seen at rest after the throw. Taking physics into account, what would be his recoil velocity?Comic-strip hero Superman meets an asteroid in outer space, and hurls it at 950 m/s, as fast as a bullet. The?Nobody is answering... Have a smile :-)