Astronomers have discovered a new planet called "Xandar" beyond the orbit of Pluto (No, not really but I need a fake planet for this problem!). It has a satellite called "Jim" that orbits with a period of 21.3 days at a distance of 14,900 km. What is the mass of "Xandar"?
6.66 x1022 kg

1.99 x 1023 kg

5.78 x1020 km

7.99 x1021 kg