In September 22, 1920, Karl Reinmuth discovered 2623 Zech with one known satellite at Heidelberg Observatory.
Karl Wilhelm Reinmuth (April 4, 1892 in Heidelberg  May 6, 1979 in Heidelberg) was a German astronomer and a prolific discoverer of 395 minor planets. 2623 Zech 22 September 1919 From 1912 to 1957, Reinmuth was working as an astronomer at the Heidelberg Observatory (German: Landessternwarte Heidelberg-Konigstuhl) an astronomical observatory on the Konigstuhl hill above Heidelberg in southern Germany. 
