Electronic Telegram No. 2281
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 2010cr IN NGC 5177
     S. Nakano, Sumoto, Japan, reports the discovery by Koichi Itagaki
(Teppo-cho, Yamagata) of an apparent supernova (mag 17.0) on unfiltered CCD
frames (limiting magnitude 19.0) taken on May 15.61 UT using a 0.60-m f/5.7
reflector (+ Bitran BT-214E camera).  The new object, which was also found at
mag 16.3 by Itagaki on an unfiltered pre-discovery frame taken on May 1.65
with a 0.50-m f/6 reflector, is located at R.A. = 13h29m25s.03 +/- 0s.01,
Decl. = +11d47'46".4 (equinox 2000.0), which is 11" east and 3" south of the
center of NGC 5177.  Nothing is visible at this position on Itagaki's many
past frames (including on 2007 Mar. 17.66, limiting mag 19.0) or on the
Digitized Sky Survey; his pre-discovery and discovery images are posted at
website URL http://www.k-itagaki.jp/images/psn5177.jpg.
     D. Bishop, Rochester, NY, writes that this object was independently
discovered (presumably at Palomar) on Apr. 16 at R = 18.0 (not visible on
Apr. 11, to limiting mag 20.9) and posted at the following website URL:
http://www.astronomerstelegram.org/?read=2580.


NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2010 CBAT
2010 May 15                      (CBET 2281)              Daniel W. E. Green