Controlling the orbital motion of the spacecraft near the libration point by changing the solar sail reflectivity

The article considers the strategy of keeping the spacecraft in the vicinity of the unstable Lagrange point (libration point) of the Sun — Earth system. This strategy involves the use of special management. This control acts collinearly to the Sun — Earth line and ensures Lyapunov stability of the orbital motion. The implementation of such control is proposed using a solar sail. The advantages and difficulties of such a strategy are discussed.