Mass of the Moon Before landing astronauts on the Moon, the Apollo 11 space vehicle was put into orbit about the Moon. The mass of the vehicle was 9979 kg and the period of the orbit was 120 min. The maximum and minimum distances from the center of the Moon were 1861 km and 1838 km. Assuming the Moon to be a uniform spherical body, what is the mass of the Moon according to these data? G = 6.67 × 10-11 N· m2/kg2