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IAUC 4223: 1986e

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                                                  Circular No. 4223
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


PERIODIC COMET MACHHOLZ (1986e)
     Further precise positions, more recent than those on the May
23 MPCs:

    1986 UT           R.A.  (1950.0)  Decl.     m1   Observer

    May  18.08194   23 58 12.17   +41 56 28.2        Wild
         26.76007   22 24 32.66   +45 29 21.4   13   Seki
         29.75347   21 42 23.28   +45 29 54.1          "
         31.66458   21 13 29.71   +44 56 11.7   15     "
         31.77292   21 11 48.67   +44 53 26.2          "

P. Wild (Astronomical Institute, Berne).  Zimmerwald station.
T. Seki (Geisei).  Communicated by S. Nakano, Tokyo.

     S. Nakano also points out that, surprisingly, comet 1986e
appears to be of short period, and he has derived the elements below
from 16 observations May 13-31.  Computations by the undersigned
suggest that  P  is uncertain by a month or two and give minimum
separations from Jupiter of 1.6 AU in 1984 and 1.3 AU in 1972.

          T = 1986 Apr. 23.534 ET
      Peri. =  14.595                    e =   0.95847
      Node  =  93.741   1950.0           a =   3.05408 AU
      Incl. =  60.209                    n =   0.184665
          q =   0.12684 AU               P =   5.34 years

     1986 ET     R.A. (1950.0) Decl.      p        r       m1

     June  3    20 37.28    +43 32.6    0.409    1.125    11.6
           5    20 06.66    +41 42.5
           7    19 37.46    +39 19.6    0.405    1.201    11.8
           9    19 10.41    +36 29.9
          11    18 45.97    +33 21.7    0.418    1.274    12.2
          13    18 24.30    +30 03.7
          15    18 05.30    +26 43.9    0.447    1.344    12.5
          17    17 48.78    +23 28.7
          19    17 34.48    +20 22.6    0.493    1.413    13.0
          21    17 22.11    +17 28.1
          23    17 11.42    +14 46.5    0.550    1.480    13.4
          25    17 02.18    +12 18.1
          27    16 54.17    +10 02.4    0.618    1.544    13.8
          29    16 47.24    + 7 58.7
     July  1    16 41.22    + 6 06.0    0.693    1.608    14.3


1986 June 3                    (4223)              Brian G. Marsden

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