The Effects of Physical Libration of Moon on Lunar Satellites

Lunar physical libration, which is the true swing of lunar equator in the space, alters the lunar gravitational field in the space coordinate system and affects the orbiting motion of lunar satellites correspondingly. This kind of affection is very similar with that of the precession and nutation on the earth satellites. The method which resemble the one used in the effects of precession and nutation on the earth satellites be adopted to discuss the effects of physical libration of moon on the motion of lunar satellite. The variation of gravitation force and the orbit's perturbation solution which indicate orbital variation clearly, are given in the paper together with corresponding numerical solution. From the aspects of both quality and quantity, this discussion is significative.