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IAUC 8908: C/2007 Y2; 2007uy

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                                                  Circular No. 8908
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Mailstop 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  ISSN 0081-0304
Phone 617-495-7440/7244/7444 (for emergency use only)


COMET C/2007 Y2 (McNAUGHT)
     R. H. McNaught reports his discovery of a comet (as tabulated
below) on CCD images taken with the 0.5-m Uppsala Schmidt telescope,
where the object appears marginally, but consistently, diffuse with
a coma diameter of about 10" in good seeing.  Three stacked 90-s R
images taken by D. M. Burton, Australian National University, with
the ANU 1.0-m f/8 reflector at Siding Spring on 2008 Jan. 1.69 show
a slightly diffuse comet (slightly involved with a star) with a 3"
tail in p.a. 20 deg.  Following posting on the Minor Planet
Center's 'NEOCP' webpage, C. Jacques and E. Pimentel write that
their astrometric CCD images from Jan. 1.14 (taken with a 0.30-m
f/3 reflector at Belo Horizonte, Brazil) show a central
condensation of size 10".

     2007 UT             R.A. (2000) Decl.       Mag.
     Dec. 31.66576    6 45 01.58   -50 45 51.5   19.0

The available astrometry, the following preliminary parabolic
orbital elements, and an ephemeris appear on MPEC 2008-A6.

     T = 2008 May  18.189 TT          Peri. = 264.435
                                      Node  = 303.854   2000.0
     q = 4.13214 AU                   Incl. =  98.702


SUPERNOVA 2007uy IN NGC 2770
     S. Nakano, Sumoto, Japan, reports the discovery of an apparent
supernova (mag 17.2) by Yoji Hirose (Tsutsumi, Chigasaki, Kanagawa-
ken, Japan) on ten unfiltered CCD frames taken around 2007 Dec.
31.669 UT using a 0.35-m f/6.8 Schmidt-Cassegrain telescope
(limiting mag 18.0); Nakano has measured mag 17.0 and the following
position for the new object from a jpeg image supplied by Hirose:
R.A. = 9h09m35s.40, Decl. = +33o07'09".9 (equinox 2000.0), which is
20".6 east and 15".5 south of the center of NGC 2770.  Nothing is
visible at this position on red Digitized Sky Survey images from
1998 and 2000, though there are apparently numerous H II regions
nearby.  Additional unfiltered CCD magnitudes for 2007uy:  2007
Mar. 7 and Dec. 18, [18 (Hirose); Dec. 31.786, 17.3 (K. Kadota,
Ageo, Japan, 0.25-m f/5 reflector; position end figures 35s.27,
08".9); 2008 Jan. 1.595, 17.0 (Hirose); 1.651, 16.9 (K. Itagaki,
Takanezawa station, Tochigi-ken, Japan, 0.30-reflector; position
end figures 35s.35, 08".9); 1.885, 16.8 (P. Corelli, Pagnacco,
Italy, 0.45-m f/4.5 reflector; position end figures 35s.17, 08".9).

                      (C) Copyright 2008 CBAT
2008 January 2                 (8908)            Daniel W. E. Green

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