Perturbed Hill Restricted Five-Body Problem Applied to a Triple Asteroid System

This paper discusses the dynamical environment around a triple asteroid system. First, the perturbed Hill restricted five-body problem is derived to describe the dynamics. This model includes the point mass gravity of the sun, three asteroids and a spacecraft, and the solar radiation pressure perturbation. Using this dynamical model, the characteristics of the dynamical environment around a triple asteroid system are presented in a simplified scenario. Then, bounded motions around a triple asteroid system are searched with various conditions using the grid search method. A planar case and a terminator case are explored, and it is shown that there exist quasi-frozen orbits and quasi-terminator orbits. The sensitivity of these orbits to the inclinations of the two moonlets is also investigated.