Color Transformation Equations between Photometric Systems of the 2MASS Catalog and the ASTRONIRCAM Camera of the SAI MSU 2.5-m Telescope

In this paper, we consider a method for determining the coefficients of the transformation equations between different photometric systems based on the photometry of all field stars recorded during observations of the primary standards of one of the photometric systems. Using this method, the coefficients of color transformation equations between the photometric systems of the ASTRONIRCAM camera of the CMO SAI MSU 2.5-m telescope and the 2MASS all-sky survey catalog are obtained.