[IAUC] CBET 1641: 20090102 : SUPERNOVA 2008ip IN NGC 4846

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                                                  Electronic Telegram No. 1641
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS en CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT en CFA.HARVARD.EDU (science)
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SUPERNOVA 2008ip IN NGC 4846
     S. Nakano, Sumoto, Japan, reports the discovery by Takao Kobayashi
(Oizumi, Gunma-ken, Japan) of an apparent supernova (mag 15.7) on numerous
unfiltered CCD frames (limiting magnitude 18.5) taken around 2008 Dec. 31.75
UT using a 0.41-m f/4.3 reflector.  Kobayashi found the star to be slightly
brighter (mag 15.5) on Jan. 1.627.  The new object is located at R.A. =
12h57m50s.20 +/- 0s.01, Decl. = +36o22'33".5 +/- 0".1 (equinox 2000.0;
average of images from the two nights), which is 30" east and 18" north of
the center of NGC 4846.  Nothing is visible at this position on Kobayashi's
past frames taken on 2003 Feb. 27, 2004 Jan. 1, and 2006 Jan. 2 (limiting
mag 18.5).  Nakano adds that K. Kadota (Ageo, Japan, 0.25-m f/5 reflector)
found 2008ip at mag 15.6 and position end figures 50s.17, 33".4 on an
unfiltered CCD image taken on Jan. 1.736; also, K. Itagaki (Yamagata, Japan,
0.30-m f/7.8 reflector + unfiltered CCD camera at Takanezawa station)
reports mag 15.8 and position end figures 50s.18, 33".1 for 2008ip on
Jan. 1.741.  Following posting on the Central Bureau's unconfirmed-objects
webpage, D. Denisenko, S. Korotkiy, and T. Kryachko (Moscow) report mag
16.1 and position end figures 50s.18, 33".3 for 2008ip from an unfiltered
CCD image obtained on Jan. 2.03 with an 80-mm f/7.5 refractor; they have
posted an image of 2008ip at the following website URL:
http://pics.livejournal.com/bigdenru/pic/00058p7p/


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                         (C) Copyright 2009 CBAT
2009 January 2                   (CBET 1641)              Daniel W. E. Green