Unfortunately Wx_Echo\'s orbit mechanic hasn\'t been updated to include Minmus. Thank you for your suggestion though, it\'s much appreciated What I\'m trying to do is go from the Mün to Minmus. Preferably when they\'re near either their ascending or descending node, so I don\'t have to aim out of the Kerbin\'s ecliptic plane, but I\'ll also try it when they are very close together somewhere else in their orbits. Come to think of it, I think that, in addition to the mission timer, KSP needs a date/time system so you can determine launch windows or calulate launch windows.