Electronic Telegram No. 2577 Central Bureau for Astronomical Telegrams INTERNATIONAL ASTRONOMICAL UNION CBAT Director: Daniel W. E. Green; Hoffman Lab 209; Harvard University; 20 Oxford St.; Cambridge, MA 02138; U.S.A. e-mail: cbatiau@eps.harvard.edu (alternate cbat@iau.org) URL http://www.cbat.eps.harvard.edu/index.html Prepared using the Tamkin Foundation Computer Network SUPERNOVA 2010kp S. Nakano, Sumoto, Japans, reports the discovery by Koichi Itagaki (Teppo-cho, Yamagata) of an apparent supernova (mag 17.9) on unfiltered CCD frames (limiting magnitude 19.5) taken on Dec. 8.505 UT using a 0.60-m f/5.7 reflector. The new object, which was confirmed at mag 18.0 by Itagaki on Dec. 9.373, is located at R.A. = 4h03m38s.85 +/- 0s.01, Decl. = +70o45'15".7 (equinox 2000.0), which is 8" west and 4" north of the center of 2MASX J04034059+7045116, and near NGC 1485. Nothing is visible at this location on his past frames, including one taken on 2009 Oct. 14.58 (limiting mag 20.0), or on the Digitized Sky Survey (limiting mag 21.0; no bandpass provided). Itagaki has posted his images at http://www.k-itagaki.jp/images/Anon-1208.jpg and http://www.k-itagaki.jp/images/Anon-1209.jpg. T. Yusa, Osaki, Japan, writes that he confirmed 2010kp at mag 17.3 on three 120-s unfiltered CCD frames (limiting magnitude 19.5) taken remotely using a 0.25-m f/3.4 hyperbolic astrograph (+ SBIG ST-10XME camera) at the RAS Observatory near Mayhill, NM, U.S.A., on Dec. 9.353; Yusa measured position end figures 38s.82, 15".7 for the new object. NOTE: These 'Central Bureau Electronic Telegrams' are sometimes superseded by text appearing later in the printed IAU Circulars. (C) Copyright 2010 CBAT 2010 December 10 (CBET 2577) Daniel W. E. Green