Stabilizing influence of earth perturbations on polar lunar orbiters

Astronomy and Astrophysics – Astronomy

Scientific paper

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Gravitational Effects, Lunar Orbits, Orbital Mechanics, Polar Orbits, Spacecraft Stability, Three Body Problem, Astrodynamics, Lunar Orbiter, Numerical Integration, Perturbation Theory, Satellite Perturbation, Zonal Harmonics

Scientific paper

A class of highly inclined lunar orbits is discussed for which earth perturbations have significant influence on the orbit evolution and the usefulness of the orbit for scientific exploration. The theory of the long-term motion of particles under third-body and zonal harmonic perturbations is taken as a starting point for investigations of orbits with relatively long lifetimes and evolutionary patterns that enhance the effectiveness of the satellite as a lunar farside relay. An equilibrium solution in the doubly-averaged three-body problem with oblateness is identified and the results of some numerical integrations are presented.

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