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IAUC 4710: 1989d

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                                                  Circular No. 4710
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Telephone 617-495-7244/7440/7444 (for emergency use only)
TWX 710-320-6842 ASTROGRAM CAM     EASYLINK 62794505
MARSDEN or GREEN@CFA.BITNET    MARSDEN or GREEN@CFAPS2.SPAN


PERIODIC COMET RUSSELL 3 (1989d)
     J. Gibson reports his recovery of this comet with the Palomar 1.5-m
reflector + CCD as shown below.  On Jan. 1 there was a faint coma about 5"
in diameter with a sharp central condensation.  Seeing was poor on Jan. 2.

     1989 UT             R.A. (1950) Decl.        m2
     Jan.  1.44638    9 31 12.15   - 2 28 04.9    20
           1.45139    9 31 12.03   - 2 28 05.2
           1.51071    9 31 10.75   - 2 28 16.4
           1.51899    9 31 10.59   - 2 28 18.3
           1.52360    9 31 10.49   - 2 28 19.1
           2.32238    9 30 53.76   - 2 30 43.1
           2.32741    9 30 53.58   - 2 30 43.9
           2.33326    9 30 53.53   - 2 30 45.3
           2.33951    9 30 53.40   - 2 30 46.3

     The indicated correction to the prediction on MPC 12136 (ephemeris
on MPC 13698) is delta T = -0.36 day.  The following improved orbital
elements, by the undersigned, are from observations 1983-1989:

                    Epoch = 1990 May  29.0 ET
     T = 1990 May  17.8860 ET         Peri. = 353.2243
     e = 0.343269                     Node  = 248.0158  1950.0
     q = 2.517249 AU                  Incl. =  14.0874
       a =  3.832997 AU    n = 0.1313398    P =   7.504 years

     1989 ET      R.A. (1950) Decl.     Delta      r       m2
     Jan.  4     9 30.27    - 2 35.5
          14     9 25.59    - 2 56.6    2.844    3.689    19.9
          24     9 19.53    - 3 04.0
     Feb.  3     9 12.52    - 2 57.2    2.684    3.627    19.7
          13     9 05.14    - 2 36.9
          23     8 58.07    - 2 05.3    2.639    3.564    19.6
     Mar.  5     8 51.94    - 1 25.8
          15     8 47.27    - 0 42.2    2.703    3.500    19.6
          25     8 44.42    + 0 01.5
     Apr.  4     8 43.56    + 0 42.0    2.849    3.436    19.6
          14     8 44.72    + 1 16.9
          24     8 47.81    + 1 44.0    3.044    3.372    19.7


1989 January 12                (4710)              Brian G. Marsden

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