In 1875, Engelhardt settled in
Dresden and built himself an observatory with his own money, where he worked alone without assistants until 1897. His main work was researching comets, asteroids, nebulae, and star clusters. In 1870 he completed the observation of 50 comets and 70 asteroids. Turning to star clusters, in 1883 he completed a catalog of more than 400 nebulae. Beginning in 1886, he observed 829 stars in
Bradley's directory to determine if they had companion stars. In the late 1890s, deteriorating health forced Engelhardt to give up personal observing, and he gave all his equipment to
Kazan University, of which his friend and fellow astronomer
Dmitri Dubyago was rector. The university built an observatory to house the equipment, which was opened in 1901 (see
Engelhardt Observatory). Until the end of his life, Engelhardt took an active part in the construction and organization of the new observatory, and in his will gave Kazan University all his money and property, to be used for the development and maintenance of the observatory. As a result, his remains were transferred in 2014 from Dresden to the grounds of the Engelhardt observatory. Engelhardt was awarded an honorary doctorate by Kazan University in 1889, and in 1890 he was made a corresponding member of the
Russian Academy of Sciences. ==Cultural activities==