[IAUC] CBET 2436: 20100903 : SUPERNOVA 2010hi IN NGC 6621

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                                                  Electronic Telegram No. 2436
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 en eps.harvard.edu (alternate cbat en iau.org)
URL http://www.cbat.eps.harvard.edu/index.html
Prepared using the Tamkin Foundation Computer Network


SUPERNOVA 2010hi IN NGC 6621
     Ron Arbour, South Wonston, Hants, U.K., reports his discovery of an
apparent supernova (mag 18.0) on unfiltered CCD images taken on Sept.
1.893 (limiting mag 19.2) and 2.883 UT using a 0.4-m f/5 Newtonian
reflector (+ Starlight Xpress camera) in the course of his supernova
patrol.  The new object is located at R.A. = 18h13m00s.76, Decl. =
+68d21'53".4 (equinox 2000.0), which is 30" east and 4" north of the
center of the galaxy NGC 6621.  Nothing is visible at this position on
Digitized Sky Survey plates from 1989 Sept. 1 (limiting blue mag 20.8)
and 1993 Aug. 12 (limiting red mag 19.5).  Arbour adds that four further
confirming images were obtained by Tom Boles between Sept. 1.9400 and
1.9435.  Following posting on the Central Bureau's unconfirmed-objects
webpage, S. Nakano (Sumoto, Japan) forwards information from a pre-
discovery unfiltered CCD image of 2010hi obtained by Koichi Itagaki
(Teppo-cho, Yamagata, Japan) using a 0.60-m f/5.7 reflector, yielding
position end figures 00s.66 +/- 0s.04, 53".0 +/- 0".1 and the following
magnitudes:  2008 June 12.685, [19.5; Sept. 1.608, 18.7; 2.565, 18.5
(limiting mag 19.5).


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                         (C) Copyright 2010 CBAT
2010 September 3                 (CBET 2436)              Daniel W. E. Green