Alexander Dmitriyevich Dubyago (Александр Дмитриевич Дубяго in Russian) (December 5(18), 1903, Kazan - October 29, 1959, Kazan) was a Soviet astronomer and expert in theoretical astrophysics. The lunar crater Dubyago is named after him and his father, Dmitry Ivanovich Dubyago.[1]