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IAUC 8402: C/2004 R2

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                                                  Circular No. 8402
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/2004 R2 (ASAS)
     G. Pojmanski, Warsaw University Astronomical Observatory,
reports the discovery by the 'All Sky Automated Survey' (ASAS) of a
comet on CCD V images taken on Sept. 3.40 UT with the ASAS-3V
instrument (a 200-mm-f.l., 70-mm-aperture, f/2.8 telephoto lens;
pixel size 14".8) at Las Campanas (measurements of ASAS-3V images
given below).  A. Hale (Cloudcroft, NM, 0.20-m reflector) reports
total visual mag 10.9 and coma diameter 2'.5 (diffuse without
condensation) on Sept. 9.47.

     2004 UT          R.A. (2000) Decl.       Mag.
     Sept. 1.387     6 34 21     -18 49.6     12.2
           3.400     6 49 25     -19 35.1     11.9
           8.350     7 31 21     -21 15.4
           8.370     7 31 32     -21 15.7
           8.393     7 31 43     -21 16.3
           8.401     7 31 47     -21 16.1     11.5
           8.411     7 31 54     -21 16.5     11.4
           8.414     7 31 55     -21 16.3     11.4

Additional astrometry and the following preliminary parabolic
orbital elements appear on MPEC 2004-R48; ephemeris H = 11.5, n = 3.

     T = 2004 Oct.  7.931 TT          Peri. =   5.228
                                      Node  = 182.395   2000.0
     q = 0.11376 AU                   Incl. =  63.109

2004 TT     R. A. (2000) Decl.   Delta     r    Elong. Phase   Mag.
Sept.10     7 46.83   -21 42.2   0.883   0.913   57.3   68.2   10.9
     12     8 06.60   -22 07.7   0.866   0.865   54.4   71.1   10.7
     14     8 27.30   -22 23.7   0.853   0.815   51.2   74.1   10.5
     16     8 48.76   -22 28.3   0.846   0.765   47.8   77.1   10.3
     18     9 10.76   -22 20.1   0.844   0.713   44.3   79.9   10.0
     20     9 33.04   -21 57.7   0.847   0.659   40.6   82.6    9.8
     22     9 55.33   -21 20.5   0.856   0.603   36.8   85.0    9.5
     24    10 17.40   -20 28.3   0.871   0.546   32.9   87.0    9.2
     26    10 39.07   -19 20.8   0.891   0.486   29.0   88.3    8.9
     28    11 00.25   -17 57.9   0.919   0.424   25.0   88.6    8.5
     30    11 20.98   -16 18.5   0.952   0.358   20.9   87.3    8.0
Oct.  2    11 41.50   -14 20.1   0.992   0.289   16.7   83.4    7.4

                      (C) Copyright 2004 CBAT
2004 September 9               (8402)            Daniel W. E. Green

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