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IAUC 4015: 1984v; 1984u

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IAUC number 

                                                  Circular No. 4015
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 HARTLEY (1984v)
     Malcolm Hartley, U. K. Schmidt Telescope Unit, reports his
discovery of a comet with the 1.2-m Schmidt telescope at Siding
Spring.  The plate shows the object as having a faint halo around
its trail, magnitude ~ 15.  The following positions are available:

          1984 UT              R.A.   (1950.0)    Decl.

          Nov. 17.62186       5 06 26.98      -10 25 16.9
               23.73112       5 01 12.41      -11 43 45.8


COMET SHOEMAKER (1984u)
     E. Bowell, Lowell Observatory, provides the following precise
positions from plates taken by B. A. Skiff, with measurements by
S. J. Bus.  The Nov. 18 pre-discovery plates show the comet as
diffuse with condensation and no tail.  The declination is uncertain
on the first Nov. 27 position.

        1984 UT            R.A.   (1950.0)   Decl.      m1

        Nov. 18.25347     3 09 18.39    +16 07 14.8    15.0
             18.30625     3 09 13.90    +16 09 32.8
             27.20278     2 59 45.31    +21 56 39.7    15.0
             27.24861     2 59 42.86    +21 58 03.1

     It is highly probable that this comet is a short-period one.
The following orbital elements are from 5 observations, Nov. 18-27.

          T = 1984 Sept. 26.162 ET
      Peri. = 317.098                    e =   0.68743
      Node  =  54.784   1950.0           a =   4.22691 AU
      Incl. =  21.958                    n =   0.113415
          q =   1.32120 AU               P =   8.69 years

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

     Nov. 16     3 12.16    +14 26.1    0.473    1.461    14.4
          21     3 06.03    +18 03.6
          26     3 00.84    +21 14.5    0.540    1.515    14.7
     Dec.  1     2 56.80    +23 59.3
           6     2 54.02    +26 20.0    0.631    1.575    15.0
          11     2 52.54    +28 19.3
          16     2 52.31    +30 00.3    0.741    1.641    15.3
          21     2 53.30    +31 26.1


1984 November 28               (4015)            Daniel W. E. Green

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