2010CBET.2200....1N

S. Nakano, Sumoto, Japan, reports the discovery by Koichi Itagaki (Teppo-cho, Yamagata, Japan) of an apparent supernova (mag 16.9) on numerous unfiltered 15-2 CCD frames (limiting mag 19.5) exposed on Mar. 11.755 UT using a 0.60-m f/5.7 reflector (+ Bitran BT-214E camera). The new object is located at R.A. = 12:59:24.03, Decl. = +27:59:47.1 (equinox 2000.0), which is 12" west and 1" south of the center of the apparent host galaxy. Nothing is visible at this position on his many past frames (including one taken on Feb. 24.762 with limiting mag 18.5) and on the Digitized Sky Survey. Itagaki has posted his discovery image at the following website URL: http://www.k-itagaki.jp/images/psn-anon.jpg. The following report was received several hours after tabulated data from Itagaki's report was posted on the Central Bureau's unconfirmed-objects webpage.