Electronic Telegram No. 1880
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT@CFA.HARVARD.EDU (science)
URL http://www.cfa.harvard.edu/iau/cbat.html


SUPERNOVA 2009hm IN NGC 7083
     P. Marples, Loganholme, Queensland, Australia, reports the apparent
discovery of a supernova in NGC 7083 by Stuart Parker (Oxford, Canterbury,
New Zealand) on a 55-s unfiltered CCD image (0.35-m Celestron C14 F6.3 SCT
and ST8 CCD camera) obtained on July 17.702 UT.  C. Drescher (Calamvale,
Queensland, Australia) measured the position as R.A. = 21h35m44s.44, Decl. =
-63d54'23".6 (equinox 2000.0, Astrometrica, USNO-B1.0 catalogue) and the
magnitude as R = 14.7.  The object was also present on images obtained by
Parker (60-s unfiltered image on July 18.305) and by Marples (25-s unfiltered
images on July 18.39 and 18.49, 0.305-m LX200 ACF), Drescher's measurements
from Marples' second image giving positional end figures 44s.39, 24".0 and
magnitude R = 14.6.

     Marples adds that nothing is visible at the object's position on either
a Digitized Sky Survey image from 1996 Sept. 8 (limiting magnitude R =
18.1) or an image obtained by Parker on 2009 May 28.75 (limiting magnitude
R = 16.6).

     The supernova was independently discovered by Berto Monard (Bronberg
Observatory, Pretoria, South Africa) on a stack of four CCD images obtained
on July 17.862 UT.  Monard gives the unfiltered magnitude as 15.4 (+/- 0.1) and
position end figures 44s.32, 23".2 (2" west and 13" south of the core of NGC
7083; UCAC2).  Nothing was visible at the object's position on June 20.031
(limiting magnitude 18.7).

     Supernova 1983Y was also detected in this galaxy (cf. IAUC 3792).



NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
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                         (C) Copyright 2009 CBAT
2009 July 18                     (CBET 1880)              Brian G. Marsden