Trajectory Analysis Between Quasi-Periodic Orbits and the Lagrangian Points Around Phobos

This paper proposes novel orbits in the Circular Restricted Three-Body Problem (CRTBP) of the Mars-Phobos system. We have found different types of quasiperiodic orbits with long-term stability that can be connected into the invariant manifolds that transport the spacecraft directly into a L1 halo orbit. We analyze the feasibility of several transfer trajectories connecting different sizes of halo orbits around L1 and L2. We further analyze the station-keeping maneuvers for the halo orbits around the collinear libration points allowing the spacecraft to stay for severaldays and increase the science performed during proximity operations in the vicinity of Phobos.