Transfer trajectory design about doubly synchronous binary asteroid system

To obtain the high-resolution image or detect the inner structure of both bodies of binary asteroid systems, the spacecraft should be given the ability to transfer between the surfaces of two components. This paper contributes to develop a robust method to design transfer trajectory in the doubly synchronous binary system based on the libration point orbits and their invariant manifolds. After selecting the surfaces of two bodies as Poincaré sections, the L₁ and L_2/3 manifolds can be patched together to construct the equatorial and spatial transfer trajectory. The heteroclinic link of the L₂ and L₃ manifolds are studied to find an alternative transfer trajectory sets by applying the tiny velocity increments. Further, the effect of the solar radiation pressure on the transfer manifold tube is discussed. The results indicate that it is suitable to transfer for a spacecraft when the sun line is perpendicular to the line connecting two bodies because the single-trip transfer tubes are generated.