A satellite is in circular orbit around an unknown planet. The satellite has a speed of v=6.36 x 10^4 m/s, and the radius of its orbit (measured from the center of the planet) is r = 2.11 x 10^6 m. A second satellite also has a circular orbit around this same planet. The orbit of this second satellite has a radius of r2 = 8.44 x 10^6 m.