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IAUC 3742: 1982i; 1982 RB

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IAUC number 

                                                  Circular No. 3742
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


PERIODIC COMET HALLEY (1982i)
     M. J. S. Belton and H. Butcher, Kitt Peak National Observatory,
have confirmed the recovery of this comet using a cryogenic
camera and charge-coupled device on the 4-m reflector.  They have
derived the following precise positions by averaging exposures
over several minutes and superposing averaged records over several
hours according to the assumed motion of the comet.

          1982 UT             R.A.     (1950.0)     Decl.

          Oct. 18.38663       7 10 53.38      + 9 31 11.7
               20.38542       7 10 43.22      + 9 29 18.5

The comet's image is slightly fainter than V = 24 and the resulting
perihelion time is T = 1986 Feb. 9.2-9.3 UT.


1982 RB
     E. M. Shoemaker, California Institute of Technology, has
identified a probable image of this object on an exposure by E.
Helin and himself with the 1.2-m Schmidt telescope at Palomar.
C. S. Shoemaker has measured the trail ends as follows:

          1982 UT            R.A.      (1950.0)     Decl.

          Oct. 11.25764      23 36 36.96      -37 46 35.2
               11.27847      23 36 38.36      -37 46 48.1

     The following improved orbital elements, by the undersigned,
are based on all the available positions Sept. 14-Oct. 11:

          T = 1982 Aug. 5.379 ET
      Peri. = 158.553                    e =   0.39430
      Node  = 158.461   1950.0           a =   2.10166 AU
      Incl. =  24.984                    n =   0.323490
          q =   1.27298 AU               P =   3.05 years

     1982 ET    R.A. (1950.0) Decl.       p        r      Mag.

     Oct. 28    23 56.89    -38 00.8
     Nov.  7     0 09.71    -36 41.4    0.816    1.534    19.3
          17     0 23.06    -34 41.7
          27     0 36.98    -32 14.8    1.045    1.630    20.0
     Dec.  7     0 51.42    -29 30.7


1982 November 5                (3742)              Brian G. Marsden

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