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IAUC 4243: 1986l

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                                                  Circular No. 4243
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 WILSON (1986l)
     The following precise positions have been reported:

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

   Aug.  6.21979   22 20 42.24   +25 06 01.1   10.5   Helin
         6.33403   22 20 30.96   +25 05 23.5            "
         6.35486   22 20 29.30   +25 05 17.7            "
         7.06632   22 19 14.59   +25 01 28.6          Pollas
         7.07465   22 19 13.82   +25 01 25.3            "
         7.23618   22 18 57.02   +25 00 30.8          Balam
         7.66319   22 18 11.82   +24 58 07.6   11.5   Seki
         7.69132   22 18 09.00   +24 57 55.6            "
         8.25215   22 17 09.83   +24 54 39.6          Balam
         9.14296   22 15 34.72   +24 49 13.7          Schwartz
         9.14691   22 15 34.24   +24 49 11.8            "
         9.25528   22 15 22.52   +24 48 29.8          Balam
        10.20753   22 13 38.96   +24 42 19.1          Shao
        10.51933   22 13 04.9    +24 40 12     12     Kaneda
        10.52685   22 13 04.1    +24 40 06              "
        10.80660   22 12 33.10   +24 38 11.9   11.5   Seki

E. Helin, S. Singer-Brewster, D. Schneeberger and S. Gerhart (Palomar).
   0.46-m and 1.2-m Schmidts.  Measurer: S. Singer-Brewster.
   The discovery magnitude (IAUC 4241) should be revised to 10.5.
C. Pollas (Caussols).  CERGA 0.9-m Schmidt telescope.
D. Balam (University of Victoria).  Measurer: J. B. Tatum.
T. Seki (Geisei).  0.6-m reflector.  Tail 10" long in p.a. 300 on
   Aug. 7.  Communicated by S. Nakano.
G. Schwartz and C.-Y. Shao (Oak Ridge Observatory).  1.5-m
   reflector. Measurer: Shao.
H. Kaneda (JCPM Sapporo Station).  0.25-m reflector.

     Total visual magnitude estimate by C. S. Morris, Whitaker
Peak, CA (0.26-m reflector): Aug. 8.43 UT, 12.1.

     The following parabolic elements are from 16 observations
Aug. 6-10.  Although there is still much uncertainty in the
ephemeris then, the comet should become a rather conspicuous
southern-hemisphere object around perihelion.

           T = 1987 Apr. 22.59 ET  Peri. = 237.13
                                   Node  = 110.46   1950.0
           q =   1.2246 AU         Incl. = 147.32


1986 August 11                 (4243)              Brian G. Marsden

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