Gravispheric effect for flights between the Earth and high lunar orbit

The article considers a variant of the lunar transportation system using an orbital station deployed in a stable high circumlunar orbit. The insignificant size of the Moon's gravisphere, in terms of planetary scales, allows us to consider the problem of near-lunar maneuvers in a new way. Rational use of gravitational perturbation from the Earth during the flight in the boundary vicinity of the Moon's gravisphere, reduces the cost of spacecraft delivery from the Earth to the high lunar orbit, where it is proposed to place the lunar orbital station. This approach is called the “gravispheric” effect, which is particularly well manifested in flights to high lunar orbit. The paper shows the mathematical description of the gravisphere effect and examples of its use in flights between the Earth and high lunar orbit obtained by the authors.