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IAUC 2723: 1974g

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                                                  Circular No. 2723
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Cable Address: SATELLITES, NEWYORK
Western Union: RAPID SATELLITE CAMBMASS


COMET VAN DEN BERGH (1974g)
     The following precise positions have been reported:

     1974 UT             R. A. (1950) Decl.        Observer
     Nov. 12.2292      1 32 39.8    +30 56 16      van den Bergh
          12.3528      1 32 37.2    +30 55 08        "
          13.1306      1 32 21.8    +30 47 56        "
          14.06604     1 32 02.67   +30 39 18.2    Shao
          14.1458      1 32 01.1    +30 38 34      van den Bergh
          14.1722      1 32 00.5    +30 38 19        "
          15.12066     1 31 41.88   +30 29 32.3    Shao & Schwartz
          15.2438      1 31 39.5    +30 28 21      van den Bergh
          16.08894     1 31 23.54   +30 20 33.7    Shao
          16.15486     1 31 22.41   +30 19 56.8    Roemer
          16.1562      1 31 22.2    +30 19 54      van den Bergh
          16.17778     1 31 21.97   +30 19 44.5    Roemer
          17.05878     1 31 05.58   +30 11 33.0    Schwartz

S. van den Bergh (Palomar Mountain Observatory).  122-cm Schmidt
   telescope.  Measurer: K. Kamper.  Comet involved with M 33 on
   Nov. 15 and 16.  The earlier plates show a coma of diameter 8",
   no condensation, and a tail 2' long.
C. Y. Shao and G. Schwartz (Harvard College Observatory, Agassiz
   Station).  155-cm reflector.  Measurer: Shao.  Comet partly on
   a star on Nov. 15.  Some cloudiness on Nov. 16.
E. Roemer (Lunar and Planetary Laboratory).  154-cm reflector.
   Comet quite well condensed.  Measurer: Carolyn McCarthy.

     The following parabolic elements, by the undersigned, are very
uncertain, particularly T and Peri., which are highly correlated:

       T = 1974 Mar. 21.6 ET     Peri. = 137.4
                                 Node  = 225.9   1950.0
       q = 5.740 AU              Incl. =  59.8

     1974 ET     R. A. (1950) Decl.     Delta     r      m2
     Nov. 19     1 30.53    +29 53.4
          29     1 28.17    +28 21.3    5.215   6.017   18.4
     Dec.  9     1 26.87    +26 52.8
          19     1 26.70    +25 30.3    5.482   6.061   18.5
          29     1 27.66    +24 15.8


1974 November 25               (2723)              Brian G. Marsden

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