Electronic Telegram No. 2335 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 2010em IN UGC 12237 Further to CBET 2329, M. Kandrashoff, S. B. Cenko, W. Li, and A. V. Filippenko, University of California, report the LOSS discovery of an apparent supernova on unfiltered KAIT images: SN 2010 UT R.A. (2000.0) Decl. Mag. Offset 2010em June 18.47 22 54 20.33 +11 46 54.7 18.4 9".6 E, 2".1 S Additional KAIT magnitudes for 2010em: a co-added image from 2009 Oct.-Dec., [19.7; 2010 June 19.47, 18.2. NOTE: These 'Central Bureau Electronic Telegrams' are sometimes superseded by text appearing later in the printed IAU Circulars. (C) Copyright 2010 CBAT 2010 June 20 (CBET 2335) Daniel W. E. Green