Сегодня родился Дубяго Дмитрий Иванович
On October 3, 1849 Dubyago Dmitry Ivanovich was born. This is a Russian astronomer. He was born in a family of hereditary nobleman, he ended a gymnasium with a gold medal and entered a physical and mathematical faculty of the Petersburg university. In 1871 the student Dubyago was awarded a gold medal of the Petersburg university for work "About the spectral analysis in application to astronomical supervision". After university he worked in Pulkovo Observatory. He combined successfully work in Dubyago's Pulkovo with lecturing on astronomy and geodesy at the Petersburg university. In 1881 "The theory of the movement of the planet of Diana" he received doctor of astronomy degree and geodesy for the thesis, then he became an associate professor of the Petersburg university. At the end of 1884 he took the place of the director of observatory of the Kazan university and professor of astronomy. Dubyago organized and directed scientific expeditions on supervision of total solar eclipses in the territory of Russia. 1899 D. I. Dubyago was appointed the rector of the Kazan university. He created the theory of the movement of an asteroid Diana. He discovered a periodic comet of C/1921 H1 (Dubyago). In honor of Dubyago and his son, the Soviet astronomer A. D. Dubyago, the lunar crater was named.