Josef Hopmann

Josef Hopmann (December 22, 1890 – October 11, 1975) was a German astronomer (also see List of German astronomers).
He was born in Berlin and received his education at universities in Bonn and Berlin, then became an assistant at Bonn Observatory in 1914. In 1930 he became a full professor and was appointed director of the Leipzig Observatory and Vienna Observatory. Between 1918 and 1974 he published nearly 100 scientific papers. In 1931–32, he and Heribert Schneller discovered that Zeta Aurigae is an eclipsing binary.
The minor planet 1985 Hopmann is named after him, as is the crater Hopmann on the far side of the Moon.