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IAUC 3965: 1984j

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                                                  Circular No. 3965
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
TWX 710-320-6842 ASTROGRAM CAM    Telephone 617-495-7244/7440/7444


COMET TAKAMIZAWA (1984j)
     The following precise positions have been reported:

    1984 UT           R.A.  (1950.0)  Decl.     m1   Observer

    July 31.67891   21 12 14.23   -18 57 28.7   10   Saito
    Aug.  1.43368   21 12 00.27   -19 07 38.7    9   Helin
          1.69618   21 11 56.51   -19 11 12.8   10   Ishida
          2.02546   21 11 50.6    -19 15 39          Maury
          2.29785   21 11 46.32   -19 19 20.0        Balam
          2.44803   21 11 43.84   -19 21 04.9        Herald
          2.44957   21 11 43.83   -19 21 05.8          "
          2.58368   21 11 41.34   -19 22 54.3    9   Kinnear
          2.59462   21 11 41.08   -19 23 03.2          "

K. Saito (Tokyo Observatory, Dodaira Station).  Measurer: H. Kosai.
E. Helin (Palomar).  1.2-m Schmidt.  Accidental image 1' in diameter,
   slightly elongated, no definite condensation, tail 1' to
   the west.  Measurer: S. Swanson (assisted by R. S. Dunbar).
K. Ishida (Tokyo Observatory, Kiso Station).  1.05-m Schmidt.
A. Maury and R. Chemin (CERGA, Caussols).  Semi-accurate position.
D. Balam (University of Victoria).  0.25-m f/2 Schmidt.
D. Herald (Kambah, near Canberra).
G. Kinnear (Perth Observatory).  Comet diffuse with condensation,
   tail ~ 1 deg.  Communicated by P. Birch.

     The following parabolic orbital elements have been derived by
the undersigned from eight of the above observations.  It is quite
probable that the comet is a short-period one.

           T = 1984 May 5.08 ET  Peri. = 132.40
                                 Node  = 125.62   1950.0
           q =   1.5613 AU       Incl. =  12.71

     1984 ET     R.A. (1950.0) Decl.      p        r       m1

     July 29    21 12.99    -18 20.0    0.928    1.936     9.2
     Aug.  3    21 11.56    -19 28.4
           8    21 10.10    -20 31.0    1.003    2.016     9.6
          13    21 08.75    -21 26.8
          18    21 07.62    -22 15.4    1.101    2.099     9.9
          23    21 06.82    -22 56.6
          28    21 06.42    -23 30.4    1.220    2.185    10.3


1984 August 3                  (3965)              Brian G. Marsden

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