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IAUC 5202: 1986 III; 1991b

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                                                  Circular No. 5202
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Telephone 617-495-7244/7440/7444 (for emergency use only)
TWX 710-320-6842 ASTROGRAM CAM     EASYLINK 62794505
MARSDEN or GREEN@CFA.BITNET    MARSDEN or GREEN@CFAPS2.SPAN


PERIODIC COMET HALLEY (1986 III)
     C. Buil, C. Calvet, E. Thouvenot, and J. F. Touillaud report
that they made 1-hr unfiltered CCD observations of P/Halley with the
0.61-m telescope of Pic du Midi Observatory on Feb. 18 and 19.  The
Feb. 18.89 UT image shows a coma about 37" in diameter, slightly
elongated toward the southwest, with the V magnitude inside a 6".75
circle being 21.6; the total magnitude was V about 19.5.  On Feb.
19.85 UT, the coma diameter was 25", with V = 21.6 inside 6".75 and
total V = 20.0.


COMET ARAI (1991b)
     Improved orbital elements by S. Nakano, Sumoto, Japan, from 59
observations 1990 Dec. 23-1991 Feb. 13, taken from MPC 17791:

     T = 1990 Dec. 10.8829 ET         Peri. = 337.6292
     e = 0.990387                     Node  = 114.8257  1950.0
     q = 1.434119 AU                  Incl. =  70.9787

     1991 ET      R.A. (1950) Decl.     Delta      r       m1
     Mar.  5     6 00.65    +69 29.9    1.379    1.853    13.4
          10     6 00.2     +70 00.0
          15     6 02.5     +70 24.1    1.584    1.939    13.9
          20     6 07.3     +70 43.7
          25     6 14.3     +70 59.8    1.786    2.030    14.3
          30     6 23.1     +71 12.8
     Apr.  4     6 33.6     +71 22.9    1.982    2.123    14.8
           9     6 45.5     +71 30.0
          14     6 58.7     +71 33.9    2.171    2.218    15.1
          19     7 13.0     +71 34.5
          24     7 28.1     +71 31.6    2.352    2.316    15.5
          29     7 44.0     +71 25.1
     May   4     8 00.4     +71 14.6    2.526    2.414    15.8
           9     8 17.1     +71 00.2
          14     8 33.9     +70 41.7    2.691    2.514    16.2
          19     8 50.9     +70 19.2
          24     9 07.71    +69 52.8    2.849    2.614    16.4


1991 March 1                   (5202)             Daniel W. E. Green

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