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IAUC 6471: C/1996 R1

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                                                  Circular No. 6471
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
BMARSDEN@CFA.HARVARD.EDU or DGREEN@CFA.HARVARD.EDU (science)
Phone 617-495-7244/7440/7444 (for emergency use only)


COMET C/1996 R1 (HERGENROTHER-SPAHR)
     Further precise CCD positions have been reported as follows:

     1996 UT             R.A. (2000) Decl.        m1    Observer
     Sept. 8.89868   23 48 27.52   +37 58 36.2          Sicoli
           8.90223   23 48 25.91   +37 58 24.7            "
           8.94025   23 48 09.18   +37 56 20.8   14.0   Ticha
           8.95067   23 48 04.61   +37 55 48.8            "
           9.17917   23 46 25.22   +37 43 26.2          Rogers
           9.21042   23 46 11.58   +37 41 44.3   13.1     "
           9.21192   23 46 10.83   +37 41 39.8   13.2   Offutt
           9.22843   23 46 03.53   +37 40 45.8   13.4     "
           9.89366   23 41 13.29   +37 03 35.1          Ewen-Smith
           9.90273   23 41 09.37   +37 03 04.8            "
           9.90477   23 41 08.24   +37 02 57.2          Sarounova
           9.91133   23 41 05.37   +37 02 34.7            "

P. Sicoli and F. Manca (Sormano).  0.5-m reflector.
J. Ticha and M. Tichy (Klet).  0.57-m f/5.2 reflector.
J. E. Rogers (Camarillo).  0.25-m Schmidt-Cassegrain.
W. Offutt (Cloudcroft).  0.6-m f/7 Ritchey-Chretien.
B. Ewen-Smith and C. Durman (Portimao).  0.5-m reflector.
L. Sarounova (Ondrejov).  0.65-m f/3.6 reflector.

     Parabolic orbital elements from 21 observations Sept. 7-9:

     T = 1996 Aug. 28.566 TT          Peri. = 139.250
                                      Node  = 149.648   2000.0
     q = 1.90096 AU                   Incl. = 145.876

1996 TT     R. A. (2000) Decl.     Delta      r    Elong. Phase      m1
Sept. 8    23 55.00    +38 45.5    1.061    1.905  134.2   22.3     11.9
     10    23 40.45    +36 57.6    1.038    1.907  137.7   20.8     11.9
     12    23 26.01    +34 56.4    1.020    1.909  140.9   19.4     11.9
     14    23 11.87    +32 42.8    1.006    1.912  143.7   18.1     11.8
     16    22 58.16    +30 18.4    0.998    1.915  145.9   17.1     11.8
     18    22 45.01    +27 45.2    0.994    1.918  147.3   16.4     11.8
     20    22 32.52    +25 05.6    0.996    1.921  147.8   16.2     11.8
     22    22 20.75    +22 22.3    1.003    1.925  147.3   16.3     11.9
     24    22 09.74    +19 37.8    1.014    1.929  146.0   16.9     11.9

                      (C) Copyright 1996 CBAT
1996 September 9               (6471)              Brian G. Marsden

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