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IAUC 6534: C/1997 A1

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                                                  Circular No. 6534
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)
BMARSDEN@CFA.HARVARD.EDU or DGREEN@CFA.HARVARD.EDU (science)
URL http://cfa-www.harvard.edu/cfa/ps/cbat.html
Phone 617-495-7244/7440/7444 (for emergency use only)


COMET C/1997 A1 (NEAT)
     Further precise CCD positions have been reported as follows:

     1997 UT             R.A. (2000) Decl.        m1    Observer
     Jan.  9.65247    9 40 54.40   +16 09 29.4   18.5   Kobayashi
           9.67270    9 40 51.96   +16 09 52.0            "
          11.38658    9 37 40.78   +16 43 27.4   18.9   Helin
          11.40340    9 37 38.85   +16 43 46.6   18.7     "
          11.61977    9 37 13.96   +16 48 03.6   18.2     "
          11.63868    9 37 11.67   +16 48 25.7   18.2     "
          11.79751    9 36 53.65   +16 51 34.7   19.4   Zhu
          11.80222    9 36 53.07   +16 51 40.8            "
          12.44963    9 35 38.41   +17 04 33.5   18.6   Helin
          12.47042    9 35 35.91   +17 04 58.7   18.7     "
          12.58014    9 35 23.25   +17 07 08.9          Abe
          12.58494    9 35 22.68   +17 07 15.0            "
          12.58889    9 35 22.21   +17 07 19.8   18.5   Sugie
          12.59722    9 35 21.20   +17 07 30.0            "

T. Kobayashi (Oizumi).  0.25-m f/4.4 reflector.  Prediscovery images.
E. Helin, K. J. Lawrence, S. Pravdo and D. L. Rabinowitz
   (Haleakala-NEAT/GEODSS).  1-m f/2.2 Ritchey-Chretien.
J. Zhu and L. J. Ma (Xinglong).  0.60-m Schmidt.  Measurer Zhu.
H. Abe (Yatsuka).  0.26-m f/6.0 reflector.  Communicated by S. Nakano.
A. Sugie (Dynic). 0.60-m f/3.7 reflector.  Communicated by Nakano.

     Parabolic orbital elements from 16 observations Jan. 9-12:

     T = 1997 June 17.208 TT          Peri. =  39.270
                                      Node  = 135.774   2000.0
     q = 3.17375 AU                   Incl. = 145.069

1997 TT     R. A. (2000) Decl.     Delta      r    Elong. Phase      m1
Jan. 12     9 36.51    +16 55.6    2.616    3.508  150.9    7.8     18.5
     17     9 26.41    +18 37.0    2.554    3.489  158.6    5.9     18.5
     22     9 15.40    +20 21.3    2.505    3.469  166.3    3.8     18.4
     27     9 03.57    +22 06.3    2.471    3.450  173.0    2.0     18.3
Feb.  1     8 51.11    +23 49.5    2.452    3.432  173.1    2.0     18.3
      6     8 38.22    +25 28.6    2.448    3.414  166.3    3.9     18.3
     11     8 25.16    +27 01.3    2.460    3.397  158.5    6.1     18.3

                      (C) Copyright 1997 CBAT
1997 January 12                (6534)              Brian G. Marsden

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