The paper describes the design of the main mirror of the Millimetron space observatory and its adjustment system. It alsopresents the results of modeling the compensation of deviations caused by various factors (temperature, opening errors,etc.) to an individual panel and to the entire mirror. The authors provide the results of experimental adaptation of anindividual panel and development of a precision cryogenic actuator for the system adjustment.

The paper provides an overview of the capabilities and algorithms of the AstroMagick software package developed at theFIAN Astro Space Center. AstroMagick is designed to control the surface and refine algorithms for adapting the main mirrorof the Millimetron space observatory. AstroMagick is used in modeling, developing, manufacturing, testing, mounting andadapting the parts of Millimetron main mirror.