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IAUC 4502: 1987f1

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                                                  Circular No. 4502
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 FURUYAMA (1987f1)
     The following positions have been reported:

    1987 UT            R.A. (1950) Decl.        m1   Observer
    Nov. 21.79074    5 20 25.9    +25 45 57          Hioki
         23.67535    5 11 55.68   +24 26 52.0   12   Furuyama
         24.58438    5 07 46.52   +23 46 54.4   12     "
         24.68368    5 07 18.85   +23 42 33.5          "
         25.16670    5 05 03.65   +23 20 46.3        McCrosky
         25.51701    5 03 25.29   +23 04 39.6   11   Hayakawa
         25.53402    5 03 20.63   +23 03 52.4          "
         25.67830    5 02 39.53   +22 57 21.9        McNaught
         25.67951    5 02 39.20   +22 57 18.4          "

T. Hioki (Okutama).  Measurer N. Kawasato.  Prediscovery image.
S. Furuyama (Ibaraki).  Measurer H. Kosai.  Longitude +140.3,
   latitude +35.8, h = 10 m.
R. E. McCrosky (Oak Ridge Observatory).
R. H. McNaught (Siding Spring Observatory).

     The following parabolic orbital elements have been determined
by S. Nakano from the six observations on Nov. 21 and 25:

           T = 1988 Feb. 26.95 ET    W = 228.69
                                     O = 250.10   1950.0
           q =   1.7634 AU           i = 118.22

     1987 ET      R.A. (1950) Decl.     Delta      r       m1
     Nov. 21     5 23.91    +26 17.5    1.220    2.159    10.3
          26     5 01.15    +22 42.3
     Dec.  1     4 37.03    +18 30.8    1.105    2.090     9.9
           6     4 12.56    +13 52.2
          11     3 48.79    + 9 02.3    1.084    2.026     9.7
          16     3 26.64    + 4 19.3
          21     3 06.73    - 0 01.8    1.155    1.967     9.8
          26     2 49.38    - 3 51.8
          31     2 34.63    - 7 08.4    1.294    1.914     9.9

     Total visual magnitude estimates: Nov. 25.28 UT, 10.1 (R. A.
Keen, Mt. Thorodin, CO, 0.32-m reflector); 26.26, 10.4 (C. S.
Morris, Lockwood Valley, CA, 0.26-m reflector); 26.92, 10.3 (G.
Keitch, Wrington, Avon, England, 0.3-m reflector); 27.36, 9.9 (D.
Levy, Tucson, AZ, 0.4-m reflector; 10' tail in p.a. 80 deg).


1987 November 27               (4502)              Brian G. Marsden

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