Electronic Telegram No. 510
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)
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SUPERNOVA 2006ch IN NGC 7753
     S. Nakano, Sumoto, Japan, reports the discovery by Koichi Itagaki
(Teppo-cho, Yamagata, Japan) of an apparent supernova (mag 16.5) on
numerous unfiltered CCD frames taken around May 9.765 UT (limiting mag
18.5) using a 0.60-m f/5.7 reflector.  The new object is located at
R.A. = 23h47m06s.12 +/- 0s.02, Decl. = +29o28'50".6 +/- 0".2 (equinox
2000.0), which is 17" east and 10" south of the center of NGC 7753.
Nothing was visible at this location on Itagaki's survey frames from
2005 Aug. 30 and Nov. 10 (limiting mag 19.0).  Itagaki confirmed 2006ch
at mag 16.6 on a frame taken on May 11.764, and again on May 14.752 at
mag 16.8.  SN 2006A (cf. IAUC 8656) appeared on the other side of the
galaxy center, but no spectroscopic information has been reported on that
object.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2006 CBAT
2006 May 15                      (CBET 510)               Daniel W. E. Green