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IAUC 3861: 1983 RB; GK Per

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IAUC number 

                                                  Circular No. 3861
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


1983 RB
     C. Shoemaker reports her discovery of a fast-moving asteroidal
object on exposures by E. Shoemaker and herself with the
0.46-m Schmidt telescope at Palomar.  A plate was taken by E.
Shoemaker with the 1.2-m Schmidt on Sept. 9.39, and S. J. Bus
assisted with further 0.46-m Schmidt observations.  The object was
later also photographed by B. A. Skiff at the Lowell Observatory's
Anderson Mesa Station.  All the available plates have been
measured by C. Shoemaker:

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

   Sept. 7.15417   22 04 12.22   + 0 48 01.1   15.5   Shoemaker
         7.17430   22 04 14.36   + 0 46 32.6            "
         9.39236   22 08 12.11   - 1 47 34.8            "
         9.46319   22 08 19.21   - 1 52 17.5            "
         9.46740   22 08 19.62   - 1 52 34.3            "
        11.24792   22 11 25.29   - 3 46 45.6          Skiff
        11.30069   22 11 30.05   - 3 49 59.2            "
        12.23194   22 13 04.29   - 4 46 19.6            "

     The following orbital elements, by C. M. Bardwell, Center for
Astrophysics, show that the object is of Amor type:

          T = 1983 July 7.982 ET
      Peri. = 114.367                    e =   0.49176
      Node  = 168.995   1950.0           a =   2.14874 AU
      Incl. =  18.989                    n =   0.312917
          q =   1.09206 AU               P =   3.15 years

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

     Sept.13    22 14.33    - 5 30.8    0.326    1.322    15.5
          18    22 22.14    - 9 47.2
          23    22 29.38    -13 07.9    0.406    1.382    16.2
          28    22 36.19    -15 41.4
     Oct.  3    22 42.72    -17 35.7    0.504    1.445    16.8
           8    22 49.10    -18 57.8
          13    22 55.41    -19 53.6    0.616    1.510    17.5


GK PERSEI
     Further visual magnitude estimates by C. E. Spratt, Victoria,
BC: Sept. 5.21 UT, 12.1; 6.24, 12.2.


1983 September 14              (3861)              Brian G. Marsden

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