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IAUC 4785: 1989 JA

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                                                  Circular No. 4785
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


1989 JA
     Further precise positions have been reported as follows:

     1989 UT             R.A. (1950) Decl.         V    Observer
     May  10.56804   13 38 53.05   +20 24 01.0   16.7   Gilmore
          13.54676   13 24 25.29   +19 21 30.4   15.9     "
          13.55486   13 24 22.68   +19 21 17.5            "
          15.38333   13 14 19.14   +18 28 41.5            "
          15.40764   13 14 10.31   +18 27 54.2            "
          15.43333   13 14 00.95   +18 27 06.0            "
          19.50838   12 47 17.27   +15 37 13.5   15.5   Tholen
          28.05417   11 26 11.66   + 4 08 51.9   11.5   Landgraf
          28.07986   11 25 52.56   + 4 05 57.1            "

A. C. Gilmore (Mount John University Observatory).  0.6-m reflector.
   Measurer P. M. Kilmartin.  Magnitude photographic.
D. J. Tholen (Mauna Kea).  2.24-m telescope encoders.
W. Landgraf (European Southern Observatory).  GPO 0.4-m astrograph.

     Improved orbital elements by W. Landgraf from 13 observations:

                    Epoch = 1989 June  3.0 ET
     T = 1989 July  8.2895 ET         Peri. = 231.6155
     e = 0.484406                     Node  =  61.0549  1950.0
     q = 0.912724 AU                  Incl. =  15.2504
       a =  1.770238 AU    n = 0.4184624    P =   2.355 years

     1989 ET      R.A. (1950) Decl.     Delta      r        V
     June  3    10 05.11    - 8 52.1    0.089    1.011    14.2
           5     9 34.50    -13 26.6
           7     9 03.50    -17 39.3    0.091    0.991    14.8
           9     8 33.08    -21 16.8
          11     8 04.13    -24 12.6    0.101    0.973    15.6
          13     7 37.32    -26 26.8
          15     7 13.04    -28 03.6    0.116    0.958    16.2
          17     6 51.40    -29 09.1
          19     6 32.35    -29 49.6    0.135    0.944    16.6
          21     6 15.71    -30 10.6
          23     6 01.25    -30 16.8    0.156    0.932    16.9


1989 May 30                    (4785)              Brian G. Marsden

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