Essay on theoretical astronomy. Doctor Mitrofan Khandrikov. Kiev Printing house S.V. Kulzhenko 1883. 448s. Hardcover, Half-skinned era. Encyclopedic format. Mitrophan Fyodorovich Khandrikov (1837-1915) - Russian astronomer and surveyor, Honored Professor of the University of Kiev. Secret Advisor. Major works in the field of theoretical and practical astronomy, celestial mechanics and geodesy. The founder of the Kiev school of theoretical astronomy. He proposed new methods for determining the elements of the orbits of planets and comets. He determined a large number of positions of the planets on the basis of observations on a refractor with a ring micrometer, observed comets, in particular, Comet Encke in 1871. He determined the difference in longitude between Kiev and Warsaw, between Kiev and Odessa. He made observations on the passage instrument in order to detect fluctuations in latitude, made observations on the meridian circle to determine the positions of the southern stars to the 8th magnitude in the zone from -10 to -15 in declination. In 1887, he participated in an expedition to the Urals to observe a total solar eclipse on August 19.