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IAUC 5711: 1993 BX3; SW UMa

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                                                  Circular No. 5711
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@CFA or GREEN@CFA (.SPAN, .BITNET or .HARVARD.EDU)


1993 BX3
     Further precise positions have been reported as follows:

     1993 UT             R.A. (2000) Decl.       Observer
     Feb. 14.58569   11 21 09.36   -12 09 33.3   McNaught
          14.59417   11 21 09.59   -12 09 10.9     "
          15.50961   11 22 01.90   -11 27 46.3   Gilmore
          15.53160   11 22 02.51   -11 26 49.6     "
          16.61528   11 22 54.83   -10 39 15.9     "
          16.63715   11 22 55.19   -10 38 18.0     "

R. H. McNaught (Bugaldie, N.S.W.).  Uppsala Southern Schmidt.
A. C. Gilmore (Mt. John Observatory).  Measurer P. M. Kilmartin.

     Improved orbital elements from 11 observations Jan. 31-Feb. 16:

     T = 1993 Jan.  5.3209 TT         Peri. = 289.7703
     e = 0.283041                     Node  = 175.6982  2000.0
     q = 1.003470 AU                  Incl. =   2.8085
       a =  1.399620 AU    n = 0.5952355    P =   1.656 years

1993 TT     R. A. (2000) Decl.     Delta      r    Elong. Phase      V
Feb. 17    11 23.22    -10 23.5    0.097    1.074  149.9   27.5     17.3
     22    11 25.96    - 6 59.5    0.108    1.089  156.5   21.3     17.4
     27    11 27.15    - 3 59.0    0.121    1.106  163.0   15.1     17.5
Mar.  4    11 27.42    - 1 22.7    0.135    1.124  169.5    9.3     17.5
      9    11 27.26    + 0 49.5    0.151    1.143  175.6    3.8     17.5
     14    11 26.98    + 2 38.6    0.169    1.163  177.7    2.0     17.7
     19    11 26.85    + 4 06.0    0.189    1.183  172.3    6.5     18.2
     24    11 27.13    + 5 12.9    0.211    1.204  166.9   10.9     18.7


SW URSAE MAJORIS
     Recent visual magnitude estimates show that this object is
undergoing a bright outburst: Feb. 16.13 UT, [13.5 (B. H. Granslo,
Fjellhamar, Norway); 16.78, 10.6 (L. Szentasko, Budapest, Hungary);
16.80, 10.7 (R. Fidrich, Budapest, Hungary); 17.11, 10.9 (Granslo);
17.74, 11.2 (H. Dahle, Oslo, Norway).


1993 February 18               (5711)              Brian G. Marsden

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