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IAUC 5695: 1993 BC2

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                                                  Circular No. 5695
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 BC2
     E. Helin and P. Rose report their discovery of a fast-moving
asteroidal object on films taken with the 0.46-m Schmidt telescope
at Palomar by Helin, K. Lawrence, and Rose.  The following positions
were measured by Rose (clouds were present during the last
two exposures on Jan. 21):

     1993 UT             R.A. (2000) Decl.       Mag.
     Jan. 21.25122    6 15 43.55   +23 24 04.7   14.0
          21.25538    6 15 45.50   +23 23 49.6
          21.26910    6 15 52.38   +23 22 54.7
          21.27326    6 15 54.35   +23 22 41.7
          22.10399    6 23 19.96   +22 29 40.2
          22.10955    6 23 22.55   +22 29 18.9
          22.25503    6 24 33.78   +22 20 12.2
          22.26059    6 24 36.25   +22 19 52.8
          22.38785    6 25 38.16   +22 11 33.2
          22.39271    6 25 40.22   +22 11 20.7

     Preliminary orbital elements from eight of the above
observations:

     T = 1993 Jan. 10.172 TT          Peri. = 167.892
     e = 0.43105                      Node  = 299.275   2000.0
     q = 1.05036 AU                   Incl. =   4.098
       a =  1.84613 AU     n = 0.392925     P =   2.51 years

1993 TT     R. A. (2000) Decl.   Delta     r    Elong. Phase    V
Jan. 23     6 30.98   +21 32.8   0.083   1.060  154.1   24.0   13.4
     25     6 47.59   +19 24.3   0.085   1.063  155.9   22.3   13.4
     27     7 03.19   +17 17.7   0.088   1.067  157.4   20.8   13.4
     29     7 17.70   +15 15.8   0.091   1.071  158.6   19.6   13.4
     31     7 31.12   +13 20.7   0.095   1.075  159.5   18.8   13.5
Feb.  2     7 43.45   +11 33.7   0.100   1.080  160.1   18.1   13.6
      4     7 54.76   + 9 55.5   0.105   1.085  160.4   17.7   13.7
      6     8 05.10   + 8 26.5   0.110   1.091  160.6   17.5   13.8
      8     8 14.55   + 7 06.6   0.116   1.097  160.6   17.4   13.9
     10     8 23.19   + 5 55.5   0.122   1.103  160.4   17.4   14.1
     12     8 31.08   + 4 52.5   0.129   1.110  160.2   17.5   14.2


1993 January 22                (5695)            Daniel W. E. Green

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