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IAUC 5284: 1991 JY

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                                                  Circular No. 5284
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


1991 JY
     The following precise positions have been reported:

     1991 UT             R.A. (1950) Decl.       Observer
     May  14.43646   17 14 32.98   +11 51 52.1   Shoemaker
          14.46563   17 14 02.02   +11 45 14.0     "
          17.13939   16 24 26.16   + 0 17 31.6   McCrosky
          17.16976   16 23 49.62   + 0 09 02.4     "
          18.32204   16 00 47.09   - 5 16 18.4   Shoemaker
          18.76117   15 51 49.76   - 7 18 41.6   McNaught
          19.32813   15 40 24.17   - 9 57 42.5   Shoemaker
          30.37418   12 51 02.09   -37 25 56.7   McNaught
          30.37556   12 51 01.30   -37 26 01.2     "
          31.36780   12 42 16.43   -38 14 24.0     "
          31.36919   12 42 15.74   -38 14 27.7     "
     June  1.37955   12 34 12.43   -38 56 24.2     "

C. and E. Shoemaker and C. M. Olmstead (Palomar).  0.46-m Schmidt.
   Measurers C. Shoemaker and T. King.  Previous May 14 measurements
   improved.
R. E. McCrosky and C.-Y. Shao (Oak Ridge).  1.5-m reflector + CCD.
R. McNaught and D. Steel (Siding Spring).  0.5-m Uppsala Southern Schmidt.

     Orbital elements from 19 observations May 14-June 1:

     T = 1991 Jan. 30.782 ET          Peri. =  36.824
     e = 0.29724                      Node  =  57.903   1950.0
     q = 0.66334 AU                   Incl. =  48.592
       a =  0.94391 AU     n = 1.074756     P =   0.92 year

     1991 ET      R.A. (1950) Decl.     Delta      r        V
     June  3    12 22.89    -39 51.4    0.245    1.167    15.5
           8    11 57.56    -41 42.0
          13    11 42.05    -42 47.3    0.370    1.190    16.7
          18    11 32.58    -43 34.2
          23    11 27.01    -44 13.9    0.496    1.207    17.4
          28    11 24.09    -44 51.1
     July  3    11 23.06    -45 28.2    0.616    1.219    17.9
           8    11 23.45    -46 06.4
          13    11 24.98    -46 46.5    0.727    1.224    18.3
          18    11 27.41    -47 29.2
          23    11 30.59    -48 14.7    0.827    1.224    18.5


1991 June 6                    (5284)              Brian G. Marsden

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