Featured Publications H. Chen, J. Ma, “Phasing Trajectories to Deploy a Constellation in a Halo Orbit”, Journal of Guidance, Control, and Dynamics, 40(10), pp. 2662—2667, 2017. Phasing trajectories for constellation deployment and rendezvous in a halo orbit H. Chen, “Capacity of Sun-driven Lunar Swingby Sequences and their Application in Asteroid Retrieval”, Astrodynamics, 7(3), pp. 315—334, 2023. Sun-driven lunar swingby sequence for sample return and asteroid retrieval H. Chen, N. Rambaux, V. Lainey, D. Hestroffer, “Mothership-Cubesat Radioscience for Phobos Geodesy and Autonomous Navigation”, Remote Sensing, 14(7):1619, 2022. Effective Phobos Geodesy and Spacecraft Autonomous Navigation enabled by Mothership-CubeSat Radioscience H. Chen, X. Hou, M. Bando, “Stable Orbiting around Small Moons using J2-Perturbed Elliptic Restricted Problem”, Journal of Guidance, Control, and Dynamics, accessed March 19, 2024 Trajectory design in the binary asteroid system based on the J2 perturbed elliptic-restricted three-body problem Quasi-periodic torus of 3D QSO around Phobos in the J2-perturbed ER3BP+GH model H. Chen, Y. Kawakatsu, T. Hanada, “Earth Escape from a Sun-Earth Halo Orbit using Unstable Manifold and Lunar Swingbys”, Transactions of the Japan Society for Aeronautical and Space Sciences, 59(5), pp. 269—277, 2016 Sun-driven lunar swingby sequence for spacecraft escape H. Chen, J. Liu, L. Long, et al., “Lunar far side positioning enabled by a CubeSat system deployed in an Earth-Moon halo orbit”, Advances in Space Research, 64(1), pp. 28—41, 2019. Low-thrust phasing in the full-ephemeris model H. Chen, E. Canalias, D. Hestroffer, X. Hou, “Effective stability of quasi-satellite orbits in the spatial problem for Phobos exploration”, Journal of Guidance, Control, and Dynamics, 43(12), pp. 2309—2320, 2020. H.Chen, H. Liu, T. Hanada, “Storm-time atmospheric density modeling using neural networks and its application in orbit propagation”, Advances in Space Research, 53(3), 558-567, 2014