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IAUC 4090: 1982i

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                                                  Circular No. 4090
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 HALLEY (1982i)
     The following observations have been reported since
conjunction. Further observations will be published in the MPCs.

   1985 UT           R.A.   (1950.0)   Decl.    m1    Observer

   July 19.43148    5 44 09.81   +18 38 54.3   16.5   West
        27.47903    5 49 20.76   +18 48 02.5          Gibson
        27.48278    5 49 20.90   +18 48 02.7            "
        28.47625    5 49 58.57   +18 49 06.2            "
        28.48007    5 49 58.73   +18 49 06.4            "
        29.47958    5 50 36.48   +18 50 09.5            "
        29.48333    5 50 36.61   +18 50 09.8            "
   Aug.  1.75382    5 52 38      +18 53.6      16     Seki
         4.78958    5 54 30.28   +18 56 33.7   16       "
         4.79861    5 54 30.54   +18 56 33.7            "

R. M. West (European Southern Observatory).  10-min exposure with
   the 0.4-m GPO astrograph.  Low in the dawn.  Image subsequently
   found by photographic amplification.  A less satisfactory
   exposure on July 20 did not show the comet.
J. Gibson (Palomar).  1.6-m reflector and CCD.  22" coma, no tail.
T. Seki (Geisei).  Coma and tail-like jet.

     Ephemeris from the orbital elements on MPC 9214:

     1985 ET     R.A. (1950.0) Decl.      p        r       m1

     Aug.  3     5 53.41    +18 54.9    3.759    3.079    16.2
          13     5 59.31    +19 04.3
          23     6 04.59    +19 13.1    3.235    2.838    15.3
     Sept. 2     6 08.95    +19 22.1
          12     6 11.98    +19 32.2    2.643    2.589    14.3
          22     6 13.03    +19 45.1
     Oct.  2     6 11.11    +20 02.7    2.008    2.330    13.0
          12     6 04.55    +20 28.0
          22     5 50.24    +21 03.7    1.370    2.060    11.4
     Nov.  1     5 22.28    +21 48.2
          11     4 29.35    +22 13.6    0.818    1.778     9.3
          21     2 57.99    +20 18.8
     Dec.  1     1 05.30    +13 39.1    0.631    1.483     7.6
          11    23 39.54    + 5 59.2
          21    22 48.47    + 0 50.5    0.939    1.176     6.9
          31    22 17.39    - 2 18.7


1985 August 6                  (4090)              Brian G. Marsden

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