Three projections of the SRG orbit onto the ecliptic planes and the scheme of the flight to the L2 point. The dotted line shows the lunar orbit. The points TCM1 and TCM2 denote major trajectory correction maneuvers of the orbit (see Sect. 5.4). The point TCM3 denotes the insertion into the quasi-stationary orbit around L2. The green and blue points indicate subsequent minor corrections of the orbit. Courtesy of the Keldysh Institute of Applied Mathematics of the Russian Academy of Sciences.