Evaluations of tracking observations from 17 satellites and a GEM-T1 geopotential model were used in the tidal recovery which was made in the presence of over 600 long-wavelength coefficients from 32 major and. The low degree and order terms in the spherical harmonic model of the tidal potential were observed through the perturbations which are induced on near-earth satellite orbital motions. Furthermore, the domestic tracking stations can meet the TT&C needs. Therefore the remaining propellant is sufficient for the mission. The research result shows that the appropriate asteroids in 20 (Toutatis) and 214869 (2007 PA8), and the least velocity increment is about 97.312 m/s for 4179 flying-by. The TT&C condition of the transfer trajectory is also analyzed. Finally, the transfer trajectory with the least propellant consumption is designed according to the accurately CHANG'E-2 orbit and the propellant constraint. As a result, the transfer trajectory design flow of global searching is presented. The iterative convergence is improved by constraining the correction variant. Secondly, the transfer trajectory design based on the differential correction is studied. Firstly, the orbit distribution and kinetic characteristics of the catalogued asteroids at present are analyzed.
Transfer trajectory design of the CHANG'E-2 asteroid exploration mission planned to further validate our deep space exploration capability and utilize the remaining propellant after the Sun-Earth/Moon libration point mission is studies in this paper.