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IAUC 5095: 1990 SA

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                                                  Circular No. 5095
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


1990 SA
     The following additional precise positions have been reported:

     1990 UT             R.A. (1950) Decl.       Observer
     Sept.14.23062   23 04 29.28   + 0 27 33.8   Balam
          14.26326   23 04 29.13   + 0 23 45.6     "
          19.20329   23 05 47.98   - 8 14 40.6   McCrosky
          19.20623   23 05 48.00   - 8 14 57.0     "
          19.41024   23 05 52.91   - 8 33 50.7   McNaught
          19.41319   23 05 52.96   - 8 34 07.1     "
          20.20076   23 06 06.25   - 9 47 44.8   Balam
          20.21326   23 06 06.22   - 9 48 53.1     "
          21.24833   23 06 24.60   -11 21 08.8     "
          21.26361   23 06 24.81   -11 22 28.2     "

D. Balam and J. Tatum (Victoria).  Prediscovery images, somewhat diffuse,
   near edge of Sept. 14 exposures, outside polygon of reference stars.
R. E. McCrosky and C.-Y. Shao (Oak Ridge).  1.5-m reflector + CCD.
R. H. McNaught (Siding Spring).  Uppsala Southern Schmidt.

     Improved orbital elements by B. G. Marsden, Center for
Astrophysics, from 16 observations Sept. 14-21:

     T = 1990 July  6.262 ET          Peri. = 116.238
     e = 0.46116                      Node  = 171.649   1950.0
     q = 1.12780 AU                   Incl. =  38.892
       a =  2.09301 AU     n = 0.325496     P =   3.03 years

     1990 ET      R.A. (1950) Decl.     Delta      r       V
     Sept.16    23 04.93    - 2 48.6    0.356    1.359    15.3
          21    23 06.33    -10 59.0
          26    23 07.99    -17 30.1    0.438    1.416    16.2
     Oct.  1    23 10.03    -22 31.0
           6    23 12.50    -26 17.2    0.552    1.474    17.1
          11    23 15.41    -29 04.0
          16    23 18.77    -31 04.4    0.685    1.535    17.7
          21    23 22.58    -32 28.2
          26    23 26.84    -33 23.4    0.829    1.596    18.3


1990 September 21              (5095)             Daniel W. E. Green

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