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IAUC 6474: P/1996 R2

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                                                  Circular No. 6474
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 P/1996 R2 (LAGERKVIST)
     The following precise CCD positions have been reported:

     1996 UT             R.A. (2000) Decl.        m1    Observer
     Sept.12.81936   22 34 02.00   -12 48 43.4   17.0   Tichy
          12.89045   22 33 59.23   -12 48 54.3          Giuliani
          12.91852   22 33 58.06   -12 48 59.0            "
          13.92553   22 33 19.31   -12 51 44.9          Boschin
          13.96167   22 33 17.89   -12 51 51.1   17.1   Laurie
          13.97166   22 33 17.52   -12 51 52.6          Boschin
          14.00688   22 33 16.20   -12 51 57.9          Laurie
          14.48819   22 32 58.18   -12 53 13.9   17.6   Abe
          14.50087   22 32 57.68   -12 53 16.2            "
          14.52637   22 32 56.67   -12 53 20.6          Ito
          14.55201   22 32 55.65   -12 53 24.0            "
          14.59757   22 32 53.84   -12 53 31.9   16.9   Nakamura
          14.60712   22 32 53.50   -12 53 33.1            "

M. Tichy (Klet).  0.57-m f/5.2 reflector.
V. Giuliani (Sormano).  0.5-m reflector.
W. Boschin, L. Drigo, G. Lombardi, E. Pettarin, and F. Piani (Farra
  d'Isonzo).  0.40-m f/4.5 reflector.  Measurer Pettarin.
S. P. Laurie (Church Stretton).  0.25-m Schmidt-Cassegrain + focal
  reducer.
H. Abe (Yatsuka).  0.26-m f/6.0 reflector.  Communicated by S.
  Nakano.
K. Ito (Nishi Kobe).  0.20-m f/4.0 reflector.  Communicated by
  Nakano.
A. Nakamura (Kuma Kogen).  0.60-m f/6.0 Ritchey-Chretien.

     Preliminary orbital elements from 17 observations, Sept. 11-14:

     T = 1997 Jan. 30.55 TT           Peri. = 339.83
     e = 0.3685                       Node  =  40.72    2000.0
     q = 2.4783 AU                    Incl. =   2.55
       a =  3.9245 AU      n = 0.12677      P =   7.77 years

1996 TT     R. A. (2000) Decl.   Delta     r    Elong. Phase    m1
Sept.14    22 33.28   -12 51.9   1.659   2.639  163.3    6.3   16.8
     19    22 30.25   -13 03.9   1.670   2.628  157.8    8.3   16.8
     24    22 27.60   -13 13.0   1.687   2.617  152.3   10.3   16.8
     29    22 25.40   -13 18.7   1.710   2.607  146.9   12.1   16.8
Oct.  4    22 23.71   -13 20.9   1.738   2.597  141.6   13.8   16.8

                      (C) Copyright 1996 CBAT
1996 September 14              (6474)            Daniel W. E. Green

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