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IAUC 8588: C/2005 P3; 2005dl

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                                                  Circular No. 8588
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)
     Preliminary parabolic orbital elements from the CCD astrometry
on IAUC 8587 (predicted magnitudes from H = 11.0, n = 3):

     T = 2005 Aug.  9.638 TT          Peri. =  30.616
                                      Node  = 245.145   2000.0
     q = 0.51554 AU                   Incl. =  89.482

2005 TT     R. A. (2000) Decl.   Delta     r    Elong. Phase   Mag.
Aug. 23    11 34.05   +36 05.2   1.162   0.604   31.3   60.5    9.7
     25    11 33.88   +37 46.5   1.181   0.629   32.2   58.8    9.9
     27    11 33.41   +39 20.4   1.199   0.656   33.2   57.4   10.0
     29    11 32.71   +40 47.6   1.215   0.685   34.3   56.2   10.2
     31    11 31.82   +42 09.1   1.230   0.715   35.5   55.2   10.4
Sept. 2    11 30.79   +43 25.6   1.243   0.746   36.9   54.3   10.5
      4    11 29.65   +44 38.0   1.254   0.777   38.3   53.5   10.7
      6    11 28.43   +45 46.8   1.264   0.810   39.8   52.8   10.8
      8    11 27.13   +46 52.8   1.272   0.842   41.4   52.2   11.0
     10    11 25.78   +47 56.5   1.279   0.876   43.0   51.7   11.1
     12    11 24.37   +48 58.4   1.285   0.909   44.7   51.2   11.2

     Visual-magnitude and coma-diameter estimates:  Aug. 26.14 UT,
10.5, 3' (A. Hale, Cloudcroft, NM, 0.20-m reflector); 26.46, 9.0,
1' (J. Kobayashi, Kumamoto, Japan, 20x100 binoculars).


SUPERNOVA 2005dl IN NGC 2276
     A. Dimai, Cortina, Italy; and M. Migliardi, Tour Tour, France,
report discovery of an apparent supernova (mag 17.1) in the course
of the CROSS program (cf. IAUC 7373) on four unfiltered CCD images
taken on Aug. 25.1 UT with the 0.5-m 'Ullrich' telescope at Cortina
d'Ampezzo, Italy.  The new object, which was confirmed at mag 16.8
on three images taken on Aug. 26.13, is located at R.A. =
7h27m31s.75, Decl. = +85o45'15".0 (equinox 2000.0), which is 18"
east and 1" south of the nucleus of NGC 2276.  Nothing is visible
at this position on mages taken on Feb. 17 (limiting mag about 19.0)
by F. Manzini and on May 19 (limiting mag about 18.5), and it is
absent from Palomar Sky Survey red and blue plates.

                      (C) Copyright 2005 CBAT
2005 August 26                 (8588)            Daniel W. E. Green

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