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IAUC 3929: 1984d

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                                                  Circular No. 3929
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 RUSSELL 4 (1984d)
     J. Gibson provides the following precise positions, obtained
with the Palomar 1.2-m Schmidt telescope:

         1984 UT              R.A.    (1950.0)   Decl.

         Mar. 10.42525      13 31 12.12      + 0 54 38.9
              11.28567      13 30 56.29      + 0 56 55.3
              11.40094      13 30 53.81      + 0 57 14.3
              11.53428      13 30 50.88      + 0 57 35.6
              21.29550      13 26 25.26      + 1 25 20.1
              22.29723      13 25 50.59      + 1 28 14.4

     The following elliptical orbital elements have been derived
by the undersigned from nine observations Mar. 2-22.  The comet
passed some 0.6 AU from Jupiter in 1975.

          T = 1984 Jan. 6.602 ET
      Peri. =  91.565                    e =   0.38147
      Node  =  71.805   1950.0           a =   3.43550 AU
      Incl. =   6.249                    n =   0.154782
          q =   2.12495 AU               P =   6.37 years

     1984 ET     R.A. (1950.0) Decl.      p        r       m1

     Mar. 21    13 26.58    + 1 24.5    1.235    2.192    13.9
          31    13 20.12    + 1 52.1
     Apr. 10    13 12.72    + 2 12.1    1.238    2.231    13.9
          20    13 05.65    + 2 18.5
          30    12 59.95    + 2 08.4    1.336    2.278    14.2
     May  10    12 56.38    + 1 40.7
          20    12 55.30    + 0 56.9    1.517    2.331    14.6
          30    12 56.71    - 0 00.6
     June  9    13 00.48    - 1 09.5    1.759    2.390    15.0
          19    13 06.32    - 2 27.0
          29    13 13.95    - 3 50.7    2.039    2.453    15.4
     July  9    13 23.10    - 5 19.0
          19    13 33.54    - 6 50.1    2.340    2.521    15.9
          29    13 45.06    - 8 22.4
     Aug.  8    13 57.51    - 9 54.9    2.649    2.591    16.3
          18    14 10.75    -11 26.3
          28    14 24.67    -12 55.6    2.953    2.664    16.6


1984 March 26                  (3929)              Brian G. Marsden

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