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IAUC 4016: 1984v; 1984m; 1984k; 1984t

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                                                  Circular No. 4016
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 HARTLEY (1984v)
     Precise positions measured by P. M. Kilmartin from exposures
by A. C. Gilmore at Mount John University Observatory:

      1984 UT             R.A.   (1950.0)    Decl.      m2

      Dec.  1.59227      4 54 00.07     -13 18 37.3     17
            1.61403      4 53 58.68     -13 18 49.1

     Parabolic orbital elements from observations Nov. 17-Dec. 1:

          T = 1985 Oct. 1.966 ET  Peri. = 256.186
                                  Node  = 249.456   1950.0
          q =   3.96657 AU        Incl. =  89.225

     1984 ET     R.A. (1950.0) Decl.      p        r       m2

     Nov. 26     4 59.17    -12 12.0    3.923    4.761    17.2
     Dec.  1     4 54.56    -13 11.7
           6     4 49.81    -14 08.0    3.888    4.716    17.2
          11     4 45.01    -15 00.1
          16     4 40.21    -15 47.9    3.885    4.671    17.1
          21     4 35.48    -16 30.9
          26     4 30.90    -17 09.0    3.913    4.628    17.1


PERIODIC COMET SCHAUMASSE (1984m)
     Total visual magnitude estimates: Nov. 20.42 UT, 9.7 (J.
Bortle, Stormville, NY, 0.32-m reflector); 22.42, 9.8 (Bortle);
26.54, 9.7 (C. S. Morris, Whitaker Peak, CA, 0.25-m reflector);
27.52, 9.7 (R. Keen, Mt. Thorodin, CO, 0.32-m reflector).


PERIODIC COMET AREND-RIGAUX (1984k)
     Total visual magnitude estimates: Nov. 22.41, 11.8 (Bortle);
24.42, 12.5 (A. Hale, Idyllwild, CA, 0.20-m reflector); 26.47,
12.5: (Morris); 27.49, 12: (Keen).


COMET LEVY-RUDENKO (1984t)
     Total visual magnitude estimates: Nov. 22.99, 8.8 (Bortle);
25.97, 9.0 (J. DeYoung, Alexandria, VA, 0.15-m reflector); 28.74,
8.7 (J.-C. Merlin, Le Creusot, France, 0.26-m refractor); Dec.
1.09, 8.8 (C. Spratt, Victoria, BC, 0.20-m reflector).


1984 December 3                (4016)              Brian G. Marsden

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