Electronic Telegram No. 2216 Central Bureau for Astronomical Telegrams INTERNATIONAL ASTRONOMICAL UNION CBAT Director: Daniel W. E. Green; Room 209; Dept. of Earth and Planetary Sciences; Harvard University; 20 Oxford St.; Cambridge, MA 02138; U.S.A. e-mail: cbat@iau.org; cbatiau@eps.harvard.edu URL http://www.cfa.harvard.edu/iau/cbat.html SUPERNOVA 2010at IN MCG +13-09-10 T. Orff reports the discovery by J. Newton and T. Puckett of an apparent supernova (mag 17.2) on unfiltered CCD images (limiting mag 19.9) taken with a 0.60-m reflector at Ellijay, GA, U.S.A., on Mar. 19.27 UT in the course of the Puckett Observatory Supernova Search. The new object, which was confirmed at mag 17.1 on images (limiting mag 19.7) taken by Orff on Mar. 20.17 with a 0.60-m reflector at Ellijay, is located at R.A. = 12h04m59s.47, Decl. = +76o07'52".3 (equinox 2000.0), which is 29".5 west and 7".5 south of the center of MCG +13-09-10. Nothing is visible at this position on images taken by Puckett on 2009 Dec. 29 (limiting mag 18.9). NOTE: These 'Central Bureau Electronic Telegrams' are sometimes superseded by text appearing later in the printed IAU Circulars. (C) Copyright 2010 CBAT 2010 March 20 (CBET 2216) Daniel W. E. Green