Carl Gustav Witt (29 October 1866 – 3 January 1946) was a German astronomer and discoverer of two asteroids who worked at the Berlin Urania Observatory, a popular observatory of the Urania astronomical association of Berlin. He wrote a doctoral thesis under the direction of Julius Bauschinger. Witt discovered two asteroids, most notably 433 Eros, the first asteroid with a male name, and the first known near-Earth object. His first minor planet discovery was the main-belt asteroid 422 Berolina, that bears the Latin name of his adoptive city.