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IAUC 4951: 1990 BA

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                                                  Circular No. 4951
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 BA
     An asteroidal object with direct near-opposition motion has been
discovered by Alain Maury with the 0.9-m Schmidt at the Observatoire de
la Cote d'Azur.  The following precise positions are available:

     1990 UT             R.A. (1950) Decl.       Mag.   Observer
     Jan. 21.89861    6 28 01.04   +26 20 19.1   16.0   Wang
          21.93333    6 28 03.81   +26 19 53.0            "
          21.94028    6 28 04.64   +26 19 45.6            "
          21.94722    6 28 05.06   +26 19 41.9            "
          22.27326    6 28 38.35   +26 15 33.9   16.0   Helin
          22.89516    6 29 43.12   +26 07 08.0   15.8   Wang
          22.92502    6 29 45.60   +26 06 45.3            "
          22.93196    6 29 46.35   +26 06 38.9            "
          22.93899    6 29 46.82   +26 06 35.2            "
          24.21719    6 32 03.78   +25 49 32.4   15.5   Helin
          24.24306    6 32 06.06   +25 49 10.4            "
          25.18385    6 33 50.60   +25 36 20.3            "

Q. Wang, C. Pollas and A. Maury (Caussols).  Measurer A. Maury.
E. Helin, B. Roman and K. Lawrence (Palomar).  0.46-m Schmidt.  Measurers
   B. Roman and J. Alu.

     Orbital elements from the above observations:

     T = 1990 Jan. 26.476 ET          Peri. = 170.166
     e = 0.31862                      Node  = 311.435   1950.0
     q = 1.14418 AU                   Incl. =   1.900
       a =  1.67921 AU     n = 0.452945     P =   2.18 years

     1990 ET      R.A. (1950) Decl.     Delta      r       V
     Jan.  9     6 10.97    +28 50.7    0.178    1.155    14.8
          14     6 16.49    +27 57.7
          19     6 23.38    +26 57.9    0.174    1.146    14.9
          24     6 31.66    +25 52.6
          29     6 41.30    +24 43.3    0.178    1.144    15.1
     Feb.  3     6 52.19    +23 31.4
           8     7 04.12    +22 18.0    0.190    1.150    15.3
          13     7 16.82    +21 04.3
          18     7 30.01    +19 51.4    0.210    1.162    15.6


1990 January 25                (4951)              Brian G. Marsden

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