A novel method of virtual trajectories is proposed for the design of multiple gravity assist trajectories. The database of virtual trajectories can be tabulated for any planetary sequence. Requirements on the mission duration and the start date are taken into account during the iterative procedure of database screening and refinement. The results of applying the virtual trajectories method to the design of mission to Uranus are given.

interplanetary flight, trajectory design, gravity assist, impulsive thrust

Theoretical and applied problems of mechanics