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IAUC 3558: 1980u; (1538)

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                                                  Circular No. 3558
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 617-864-5758


COMET PANTHER (1980u)
     The following precise positions have been reported:

     1980 UT             R. A. (1950) Decl.        m1   Observer
     Dec. 27.76076    18 47 55.60   +39 22 27.5   12    Manning
          27.78993    18 47 56.34   +39 22 52.1           "
          27.83819    18 47 57.90   +39 23 34.1           "
          27.95390    18 48 01.12   +39 25 19.8         Schwartz
          29.42986    18 48 45.24   +39 47 40.5   10    Seki
          30.86386    18 49 30.09   +40 10 23.6           "
          30.95234    18 49 32.25   +40 11 53.0         Schwartz

B. Manning (Stakenbridge).  Communicated by G. M. Hurst.
G. Schwartz (Harvard College Observatory, Agassiz Station).  0.4-m
   astrograph.  Measured by C.-Y. Shao.  Comet strongly condensed.
T. Seki (Geisei).   Communicated by H. Kosai.

     Parabolic orbital elements by the undersigned:

       T = 1981 Jan. 28.374 ET   Peri. = 106.821
                                 Node  = 331.193   1950.0
       q = 1.63662 AU            Incl. =  82.370

     1981 ET     R. A. (1950) Decl.     Delta     r      m1
     Jan.  1    18 50.09    +40 29.2
           6    18 52.87    +42 00.1    1.828   1.664    9.5
          11    18 55.86    +43 45.3
          16    18 59.06    +45 46.3    1.741   1.645    9.4
          21    19 02.45    +48 04.4
          26    19 06.05    +50 41.3    1.645   1.637    9.2


(1538) DETRE = 1980 SK
     L. K. Kristensen, University of Aarhus, writes that he has
found the above identification for this lost minor planet, the
original provisional designation of which was 1940 RF.  Since the
published 1940 observations are discordant, and since there seem to be
no observations at other oppositions, it would be useful to obtain
more observations now.  The ephemeris continues as follows: Jan.
6.0 ET, R.A. = 0h36m.9, Decl. = +14o22' (equinox 1950.0); 16.0, 0h53m.6,
+15o48'; 26.0, 1h11m.4, +17o19'.  The magnitude is ~ 19.


1981 January 2                 (3558)              Brian G. Marsden

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