For the exploration of asteroids, especially those with small masses, there are several options for the probe: flybying the asteroid, becoming a satellite of the asteroid, or formation flying with the asteroid. This study focuses on the last two kinds of orbits. For the circulate orbit, the model of the asteroid’s gravity field is an important issue. Difficulties will be encountered when constructing the analytical solutions to the circulate orbits. Two kinds of formation flying orbits are considered in this study: (1) around the collinear libration points (CLPs) of the Sun-asteroid system, and (2) directly around the asteroid itself. The asteroid Apophis is used as an example throughout the paper. For the first formation flying strategy, the operation orbits (Lissajous orbits and halo orbits) around the CLP L1 are firstly constructed in the circular restricted three-body problem (CRTBP), and then generalized to the real force model. For the second formation flying strategy, the operation orbits are firstly constructed using the well-known C-W equation, and then also generalized to the real force model, where the asteroid’s true orbit and the solar radiation pressure (SRP) are considered. Studies in this work may be used as references for future asteroid missions.
Operation Orbit Options for Asteroid Explorations
2015
14 Seiten
Aufsatz (Konferenz)
Englisch
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