Supernova 2004ad in NGC 789

M. Armstrong, Rolvenden, U.K., reports the discovery of an apparent supernova (mag 17.0) on unfiltered CCD images taken on Mar. 1.796 and 2.789 UT. The new object is located at R.A. = 2h02m26s.39, Decl. = +32o04'22".2 (equinox 2000.0), which is approximately 4" east and 1.6" north of the center of NGC 789. Nothing was visible at this position on Armstrong's images taken on 2003 Sept. 24 (limiting mag 19.5), 2004 Jan. 9 (limiting mag 18.5), and Feb. 9 (limiting mag 19.0) or on Palomar Sky survey red and blue plates.