Trajectory Design, Stability, and Maintenance Analysis of Quasi-Satellite-Orbits in Martian Moons Environment

This paper presents advanced methods for designing scientific trajectories in the unique dynamical environment of the Martian moons, with a particular focus on stability analysis and station-keeping strategies. Such trajectories, aimed at deepening the understanding of Phobos and Deimos characteristics, have been proposed in different mission concepts over the past decade. The Japan Aerospace Exploration Agency's Martian Moons eXploration (MMX) mission, scheduled to visit Phobos in 2026, will mark the first practical implementation of these concepts. To build upon and complement the preparatory studies conducted for MMX, this work provides an in-depth analysis of orbital dynamics and long-term trajectory design specifically around Deimos. The results contribute to a broader framework for mission planning in irregular and weak-gravity environments, with implications for future exploration of small celestial bodies.