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IAUC 4301: 1987b

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                                                  Circular No. 4301
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 WISEMAN-SKIFF (1987b)
     The following additional precise positions have been reported:

   1987 UT            R.A.  (1950)   Decl.        m1     Observer
   Jan. 20.50277    7 43 15.65    - 0 36 06.6    15.5    Mori
        20.62604    7 43 08.24    - 0 38 04.9            Seki
        21.20347    7 42 40.18    - 0 47 09.8            Wiseman
        21.23125    7 42 38.79    - 0 47 33.8            Bus

H. Mori (YGCO Hoshikawa and Nagano Stations).
T. Seki (Geisei).  Strong condensation.
J. Wiseman and S. J. Bus (Lowell Observatory, Anderson Mesa
   Station. Measurer E. Bowell.  Decl. uncertain on Jan. 21.20347.

     The following orbital elements by B. G. Marsden, Center for
Astrophysics, from 6 observations, 1986 Dec. 28-1987 Jan. 21,
indicate that this is a short-period comet, and that it passed some
0.25 AU from Jupiter in 1984:

     T     = 1986 Nov. 22.764 ET
     Peri. = 171.777                    e =   0.56914
     Node  = 271.017   1950.0           a =   3.49467 AU
     i     =  18.215                    n =   0.150867
     q     =   1.50570 AU               P =   6.53 years

     1986/87 ET   R.A. (1950) Decl.     Delta      r       m1
     Dec. 16     8 09.16    +14 34.0    0.626    1.526    14.3
          26     8 04.92    + 9 26.4
     Jan.  5     7 57.15    + 4 47.7    0.619    1.573    14.4
          15     7 48.02    + 1 01.2
          25     7 39.74    - 1 40.7    0.694    1.644    14.9
     Feb.  4     7 34.00    - 3 19.4
          14     7 31.79    - 4 07.3    0.844    1.734    15.5
          24     7 33.23    - 4 20.0
     Mar.  6     7 38.03    - 4 11.4    1.054    1.839    16.3
          16     7 45.71    - 3 53.3
          26     7 55.68    - 3 33.3    1.310    1.953    17.0
     Apr.  5     8 07.45    - 3 16.8
          15     8 20.59    - 3 07.3    1.600    2.075    17.7
          25     8 34.71    - 3 06.4
     May   5     8 49.54    - 3 14.9    1.916    2.200    18.3


1987 January 21                (4301)            Daniel W. E. Green

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