Does Anyone know the masses of the planets? I want to model it in Universe Sandbox but I want to know the masses. Also, the orbital periods, the Class of the star, etc. Because Kerbin would have to orbit between the orbits of Venus and Mercury to be in the habitable zone of a K2V star with .75 Solar masses Unless Kerbol is expanding into a red giant, rendering Kerbol habitable while the HZ Expands, I. Which I see why they are trying to ditch Kerbin.