AIP Conference Proceedings [AIP Publishing XLIII ACADEMIC SPACE CONFERENCE: dedicated to the memory of academician S.P. Korolev and other outstanding Russian scientists – Pioneers of space exploration - Moscow, Russia (28 January–1 February 2019)] XLIII ACADEMIC SPACE CONFERENCE: dedicated to the memory of academician S.P. Korolev and other outstanding Russian scientists – Pioneers of space exploration - Estimation of the thermal state of a large reflector taking into account the rods mutual shading