A 120kg astronaut stands on the surface of an asteroid of radius 600m. The astrunaut leaves the surface with 15J of kinetic energy and reaches a maximum height of 300m above the surface. What is the mass of the asteroid? (Answer: 3.4*1012kg) At the maximum height, all of the kinetic energy becomes potential gravitational energy. EK = Epg 15 = Gmm'/r 15 = 6.67*10-11*120*m'/(300+600) 1.7*1012kg = m' I think there's an error in the calculation somewhere because my answer is exactly half the correct answer but I can't figure out what I'm doing wrong.