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IAUC 3909: 1984a

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                                                  Circular No. 3909
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 BRADFIELD (1984a)
     The following precise positions have been reported:

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

    Jan. 11.82361   16 11 54.66   -49 14 54.5        Candy
         13.81944   16 22 16.92   -50 23 51.0          "
         14.5940    16 26 27.22   -50 49 41.9   11:  Gilmore
         14.6273    16 26 37.16   -50 50 56.6          "
         15.62396   16 31 59.83   -51 23 23.1   13     "
         15.63438   16 32 03.37   -51 23 42.4          "

M. P. Candy and V. Candy (Perth Observatory, Bickley).
A. C. Gilmore (Mt. John Observatory).  Measurer: P. M. Kilmartin.
   Object diffuse with condensation.  Jan. 14: 0.13-m astrograph,
   trailed images on dark plate, magnitude only a guess.  Jan. 15:
   0.6-m reflector.

     The following sets of parabolic orbital elements have been
computed.  The ephemeris is from the second set.

            M. P. Candy                  B. G. Marsden
     T = 1983 Dec. 29.936 ET      T = 1983 Dec. 28.244 ET
 Peri. = 220.91               Peri. = 219.560
 Node  = 356.85   1950.0      Node  = 356.374   1950.0
 Incl. =  51.87               Incl. =  51.705
     q =   1.3765 AU              q =   1.36723 AU
     (3 obs. 1984 Jan. 9-13)      (5 obs. 1984 Jan. 9-15)

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

     Jan.  1    15 22.26    -42 17.3    1.872    1.368    12.7
           6    15 43.86    -45 38.1
          11    16 07.74    -48 45.6    1.851    1.382    12.7
          16    16 34.06    -51 35.5
          21    17 02.85    -54 03.2    1.854    1.411    12.8
          26    17 33.92    -56 05.0
          31    18 06.78    -57 38.0    1.879    1.454    13.0
     Feb.  5    18 40.65    -58 40.8
          10    19 14.56    -59 13.8    1.923    1.509    13.2
          15    19 47.51    -59 19.5
          20    20 18.69    -59 01.6    1.980    1.574    13.5
          25    20 47.58    -58 24.8
     Mar.  1    21 13.90    -57 33.7    2.044    1.649    13.7


1984 January 16                (3909)              Brian G. Marsden

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