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IAUC 4000: 1984q

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                                                  Circular No. 4000
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 SHOEMAKER (1984q)
     The following positions have been reported:

     1984 UT            R.A.   (1950.0)   Decl.     Observer

     Sept. 1.25002    23 50 15.4     +10 12 24      McCrosky
          22.05081    23 22 19.0     +15 53 56        "
     Oct.  4.16954    23 06 50.98    +18 13 31.9    Gibson
           4.23234    23 06 45.8     +18 14 04      McCrosky
           5.23299    23 05 40.33    +18 23 33.2    Tatum
           5.23395    23 05 39.77    +18 23 37.6    Shao
           5.24347    23 05 39.41    +18 23 42.0    Gibson
           6.16297    23 04 40.09    +18 32 04.8    Shao
          14.09028    22 57 25.11    +19 35 54.7    Skiff
          14.09775    22 57 24.67    +19 35 58.6      "

R. E. McCrosky and C.-Y. Shao (Oak Ridge Observatory).  0.4-m
   astrograph on Oct. 5 and 6, otherwise Damon patrol plates.
J. Gibson (Palomar).  1.2-m Schmidt.
J. B. Tatum (University of Victoria).  0.25-m f/2 Schmidt.
B. A. Skiff (Lowell Observatory, Anderson Mesa Station).  Measurer:
   S. J. Bus.  Second exposure shortened by clouds.

     The following orbital elements are from 10 observations Sept.
27-Oct. 14.  The comet passed some 0.3 AU from Jupiter in 1980.

         T = 1984 Sept. 15.5379 ET
     Peri. =  18.1598                    e =   0.473805
     Node  = 339.3752   1950.0           a =   3.762522 AU
     Incl. =  26.3846                    n =   0.1350472
         q =   1.979821 AU               P =   7.298 years

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

     Sept.27    23 15.62    +16 56.7
     Oct.  7    23 03.80    +18 39.7    1.054    1.988    12.1
          17    22 55.36    +19 55.7
          27    22 51.04    +20 53.0    1.195    2.010    12.4
     Nov.  6    22 50.93    +21 40.5
          16    22 54.69    +22 25.5    1.392    2.045    12.8
          26    23 01.81    +23 12.7
     Dec.  6    23 11.79    +24 05.1    1.625    2.093    13.3
          16    23 24.12    +25 03.9
          26    23 38.40    +26 09.3    1.877    2.151    13.7


1984 October 15                (4000)              Brian G. Marsden

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