Design of an asteroid flying-by mission for CHANG'E-2

An asteroid rendezvous plan for CHANG'E- 2 was put forward and the corresponding mission was designed to maximize the satellite utilization. First,the satellite status of CHANG'E- 2 at present was introduced. Based on the constraint of the current CHANG'E- 2 orbit and remaining fuel and TTC( telemetry,track,and command) capacity,the design of optimal transfer trajectory and the selection of rendezvous asteroid were studied. The suitable asteroids for rendezvous were given as a result. Second,the mid-course correction was studied according to two orbit maneuver modes,i. e.,the fixed interval mode and the fixed interval mode with a least velocity increment constraint. Finally,the TTC condition of the asteroid rendezvous mission was briefly analyzed according to the Chinese deep space network. The results show that the fuel remains can support the rendezvous of CHANG' E- 2 with Asteroid 1997XF11and 2005VS. Furthermore,the Chinese deep space network can provide an 8- h daily VLBI( Very Long Baseline Interferometry) tracking at least in the interplanetary course. The velocity increment for midcourse corrections is less than 10 m / s.