Carl Ernst Albrecht Hartwig
Carl Ernst Albrecht Hartwig (January 14, 1851 in Frankfurt – May 3, 1923 in Bamberg) was a German astronomer.
He discovered a new star in M31 (the "Andromeda Nebula") on August 20, 1885. This object was designated as supernova "S Andromedae". He observed the 1882 transit of Venus in Argentina. During the 1883 observation campaign of comet 6P/d'Arrest he found five NGC objects working at the Strasbourg Observatory. In 1874 he became assistant at Strassburg Observatory, 1884 astronomer at Dorpat Observatory and 1887 director of Bamberg Observatory.
Craters on the Moon and on Mars were named in his honor.