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IAUC 3894: 1983v; TT Ari

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                                                  Circular No. 3894
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 617-864-5758


COMET HARTLEY-IRAS (1983v)
     On Nov. 11 J. Davies and S. Green, University of Leicester,
reported the discovery of another fast-moving object with the
Infrared Astronomy Satellite.  On being asked to confirm the object,
K. S. Russell, U.K. Schmidt Telescope Unit, informed us that M.
Hartley had previously discovered a cometary image on a single
exposure with the U.K. Schmidt six days earlier.  He suggested that
the two objects are identical, but a further plate taken through
cloud and in bright moonlight on Nov. 14 was not able to confirm
this.  Confirmation came with his observation on Nov. 23.

   1983 UT          R.A.  (1950.0)   Decl.     m1    Observer

   Nov.  4.46751   21 50 49.68   -21 31 46.7   15     Hartley
         4.47793   21 50 48.05   -21 31 23.5            "
        10.35185   21 33.22      -16 41.6      15.5   IRAS
        10.49494   21 32.94      -16 34.6               "
        23.45      21 08.50      -07 28.9      15.5   Russell

     The following rough parabolic orbital elements have been
derived by the undersigned from the above observations:

           T = 1983 Dec. 31.14 ET  Peri. =  39.01
                                   Node  = 359.54   1950.0
           q =   1.3683 AU         Incl. =  97.62

     1983 ET     R.A. (1950.0) Decl.      p        r       m1

     Nov.  2    21 59.78    -23 40.1    1.042    1.614    15.2
           7    21 42.68    -19 23.9
          12    21 29.23    -15 24.6    1.165    1.544    15.2
          17    21 18.72    -11 44.7
          22    21 10.52    - 8 23.9    1.311    1.483    15.3
          27    21 04.16    - 5 20.4
     Dec.  2    20 59.26    - 2 31.8    1.464    1.433    15.4
           7    20 55.51    + 0 04.5
          12    20 52.69    + 2 30.7    1.609    1.397    15.5
          17    20 50.61    + 4 49.1
          22    20 49.12    + 7 01.4    1.739    1.375    15.6


TT ARIETIS
     Visual magnitude estimates by M. Verdenet, Bourbon-Lancy,
France: Nov. 3, 15.4; 5, 15.2; 6, 14.9; 8, 15.2.


1983 November 25               (3894)              Brian G. Marsden

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