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IAUC 8587: C/2005 P3

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IAUC number 

                                                  Circular No. 8587
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://cfa-www.harvard.edu/iau/cbat.html  ISSN 0081-0304
Phone 617-495-7440/7244/7444 (for emergency use only)


COMET C/2005 P3 (SWAN)
     Several people reported the appearance of a possible comet in
ultraviolet SWAN website images taken with the SOHO spacecraft,
including H. Sato (Sukagawa, Fukushima-ken, Japan; via S. Nakano,
Sumoto, Japan), M. Suzuki (Utsunomiya, Tochigi, Japan), M.
Mattiazzo (Adelaide, S. Australia), M. Jaeger (Vienna, Austria),
and V. Bezugly (Dnepropetrovsk, Ukraine).  Following requests for
confirmation by the Central Bureau, A. Hale (Cloudcroft, NM)
reported a visual observation of the object on Aug. 25.142 UT with
a 0.41-m reflector, which had a moderately condensed 3' coma and a
guessed total mag of roughly 9.5; his observation was combined with
the necessarily very rough SWAN positions below measured by Sato to
produce an ephemeris for the 'NEO Confirmation Page'.  Available
positions follow (Aug. 4 and 7 positions from Mattiazzo):

     2005 UT             R.A. (2000) Decl.       Mag.   Observer
     Aug.  4         11 12.2       +15 20               SWAN
           7         11 16.1       +18 31                 "
           9         11 20.9       +21 08                 "
          14         11 30.3       +28 07                 "
          16         11 31.8       +30 11                 "
          18         11 33.3       +32 34                 "
          21         11 33.7       +35 22                 "
          24.83145   11 33 54.79   +37 38 23.5   11.8   Sanchez
          24.84571   11 33 53.86   +37 38 57.1            "
          24.87452   11 33 53.77   +37 40 21.0            "
          25.142     11 33 50      +37 52.0             Hale
          26.12613   11 33 38.53   +38 40 13.6   14.4   McGaha
          26.12675   11 33 38.51   +38 40 14.8            "
          26.43616   11 33 33.75   +38 54 37.7          Kadota
          26.43990   11 33 33.73   +38 54 45.8            "
          26.44168   11 33 33.67   +38 54 51.4   11.0     "

S. Sanchez, R. Stoss, J. Nomen (Mallorca). 0.07-m f/2.8 refractor
  + CCD.  Clearly diffuse.
J. E. McGaha (Tucson).  0.36-m f/10.0 Schmidt-Cassegrain reflector
  + CCD.  Inner coma of size 15" x 10", outer coma of size 45" x
  32" (elongated in both cases in p.a. 225 deg.
K. Kadota (Ageo, Japan).  0.25-m f/5.0 reflector + CCD.  Diffuse
  coma of diameter 2' with central condensation, no tail.  Comm. by
  Nakano.

                      (C) Copyright 2005 CBAT
2005 August 26                 (8587)            Daniel W. E. Green

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