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IAUC 4211: 1986d

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                                                  Circular No. 4211
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 SINGER BREWSTER (1986d)
     The following precise positions have been reported:

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

  May   3.33681   14 50 10.59   - 6 34 02.2   15   Singer-Brewster
        3.36250   14 50 10.09   - 6 33 49.5          "
        5.58939   14 49 09.04   - 6 11 17.6   16   Gilmore
        5.60414   14 49 08.47   - 6 11 06.5          "
        6.48128   14 48 44.81   - 6 02 30.5   16     "
        6.50275   14 48 44.13   - 6 02 17.7          "
        6.54479   14 48 42.98   - 6 02 05.8   16   Seki
        6.57292   14 48 42.26   - 6 01 52.7          "

S. Singer-Brewster, D. Schneeberger and E. Burr (Palomar).  0.46-m
   Schmidt telescope.  Measured by M. Rudnyk.
A. C. Gilmore and P. M. Kilmartin (Mount John Observatory).
T. Seki (Geisei).  Communicated by S. Nakano.

     Parabolic and elliptical orbital elements have been derived
from the above observations.  The ellipse seems preferable and was
used for the ephemeris, but the eccentricity is very uncertain.

         T = 1985 Dec. 16.19 ET     T = 1986 June 27.00 ET
     Peri. = 320.55             Peri. =  60.84
     Node  = 204.59   1950.0    Node  = 188.26   1950.0
     Incl. =  18.31             Incl. =   7.49
         q =   1.9676 AU            q =   1.7630 AU
         e =   1.0                  e =   0.4114

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

     Apr. 30    14 51.64    - 7 08.3    0.826    1.827    15.7
     May   5    14 49.42    - 6 17.2
          10    14 47.13    - 5 29.3    0.808    1.807    15.6
          15    14 44.94    - 4 46.2
          20    14 43.04    - 4 09.3    0.811    1.791    15.6
          25    14 41.59    - 3 39.7
          30    14 40.70    - 3 18.1    0.831    1.778    15.6
     June  4    14 40.48    - 3 04.7
           9    14 41.00    - 2 59.6    0.868    1.769    15.7
          14    14 42.32    - 3 02.7
          19    14 44.44    - 3 13.4    0.918    1.764    15.8


1986 May 8                     (4211)              Brian G. Marsden

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