the planet Uranus has mass 8.7 x 1025 kg. ... radius 5.1 x 107 m around Uranus. G= 6.7 x ... The gravitational potential of the satellite is its centripetal force. ... Moon. Use this idea to calculate the mass of the Earth M from the values of vand rgiven ... 9mm . Ve GM. Ma var. 1023** 3-8* 10". M= ... 5.9x1024... kg [2]. 6-7x 10-11.