Electronic Telegram No. 2276
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 2010cp IN NGC 4877
     S. Nakano, Sumoto, Japan, reports the discovery by Koichi Itagaki
(Teppo-cho, Yamagata, Japan) of an apparent supernova (mag 17.5) on unfiltered
CCD frames (limiting magnitude 19.0) taken on May 9.581 UT using a 0.60-m
f/5.7 reflector (+ Bitran BT-214E camera).  The new object is located at
R.A. = 13h00m25s.79, Decl. = -15d17'19".8 (equinox 2000.0), which is 8" west
and 19" south of the center of NGC 4877.  Nothing is visible at this position
on Itagaki's images from 2007 Feb. 25.708 (limiting mag 18.5) and 2010 May
1.633 (limiting mag 17.5) or on the Digitized Sky Survey (DSS).  Itagaki's
discovery frame has been posted at http://www.k-itagaki.jp/images/psn4877.jpg.
T. Yusa, Osaki, Japan, reports his confirming unfiltered CCD images of 2010cp
at mag 16.8 on May 10.145 (0.25-m f/3.4 reflector + SBIG ST-10XME camera,
GRAS Observatory near Mayhill, NM, U.S.A.; limiting mag 19.5) and on May
11.388 (0.41-m f/8.4 reflector + SBIG ST-1001E camera, GRAS Observatory,
Moorook, Australia; limiting mag 19.0), measuring position end figures
25s.82 +/- 0s.01, 19".8 +/- 0".1; nothing was visible at this position on
DSS images from 1983 May 10 and 1997 June 2 (red).


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2010 CBAT
2010 May 11                      (CBET 2276)              Daniel W. E. Green