2010CBET.2564....1N

S. Nakano, Sumoto, Japan, reports the discovery by Koichi Itagaki (Teppo-cho, Yamagata) of an apparent supernova (mag 16.9) on unfiltered CCD frames taken on Dec. 2.473 UT using a 0.60-m f/5.7 reflector (limiting magnitude 19.0). The new object is located at R.A. = 23:16:09.58 ± 0s.02, Decl. = -2:14:05.3 ± 0".3 (equinox 2000.0), which is 5".4 west and 5".2 south of the center of the presumed host galaxy, 2MASX J23160991-0214004. Nothing is visible at this position on the Digitized Sky Survey (no limiting-magnitude information provided). Additional unfiltered CCD magnitudes for 2010ki: 2006 Aug. 3.63, [19.5 (Itagaki); 2010 Nov. 21.447, 17.3 (Itagaki; pre-discovery; 0.50-m f/6 reflector); Dec. 3.062, 16.3 (T. Yusa, Osaki, Japan, 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.; position end figures 09s.58, 06".1; offset 4".5 west, 5".3 south). Itagaki has posted his images of 2010ki at http://www.k-itagaki.jp/images/psn-1202.jpg. Yusa's image is posted at the following website URL: http://www.palette.furukawa.miyagi.jp/space/images/PSN_101203.jpg