Using a Three-Impulse Maneuvering Scheme for Returning from the Lunar Orbit to the Reentry Point of the Earth’s Atmosphere

A practically useful algorithm for constructing the trajectory of returning from a Lunar orbit to the Earth using one-impulse and three-impulse maneuvering schemes is presented. This algorithm forms the return trajectory to the reentry point of the atmosphere satisfying the given constraints, taking into account the current ephemeris and the fact that the gravitational fields of the Moon and Earth are noncentral. The computer simulation results make it possible to draw conclusions about the advantages and expedience of using a particular maneuvering scheme.