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IAUC 5789: 1993 HA2

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                                                  Circular No. 5789
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 HA2
     D. L. Rabinowitz, Lunar and Planetary Laboratory, reports his
discovery of a slow-moving asteroidal object.  Available precise
positions:

     1993 UT             R.A. (2000) Decl.        V     Observer
     Apr. 26.28179   14 08 56.38   -14 12 46.1   20.0   Rabinowitz
          26.31486   14 08 55.90   -14 12 44.3   20.2     "
          26.34835   14 08 55.45   -14 12 43.0   20.0     "
          27.21471   14 08 42.96   -14 12 07.4   20.0     "
          27.22301   14 08 42.82   -14 12 06.6   20.0     "
          27.23102   14 08 42.72   -14 12 06.5   20.0     "
          28.19026   14 08 28.97   -14 11 26.4   20.5     "
          28.20179   14 08 28.76   -14 11 25.5   20.1     "
          28.22525   14 08 28.43   -14 11 24.4   20.3     "
          29.26570   14 08 13.36   -14 10 41.3   20.5     "
          29.28777   14 08 13.07   -14 10 39.9   20.0     "
          29.31249   14 08 12.72   -14 10 39.1   20.2     "
          30.22551   14 07 59.67   -14 10 01.0   20.5     "
          30.24824   14 07 59.37   -14 09 58.6   20.0     "
     May  11.61686   14 05 21.24   -14 02 11.1          McNaught
          11.62031   14 05 21.19   -14 02 10.9            "
          11.65243   14 05 20.74   -14 02 09.3            "
          11.65671   14 05 20.68   -14 02 09.2            "
          13.25397   14 04 59.43   -14 01 07.4   20.1   Rabinowitz
          13.29370   14 04 58.91   -14 01 06.1   20.3     "
          13.32135   14 04 58.48   -14 01 05.4   20.2     "

D. L. Rabinowitz (Kitt Peak).  0.91-m Spacewatch telescope.
R. H. McNaught, D. I. Steel, and C. Pollas (Siding Spring).  1.0-m
   reflector + CCD.  Measurer McNaught.

     Computations by B. G. Marsden, Center for Astrophysics, indicate
that the object is now around 11-12 AU from the earth and probably
in an orbit that is quite eccentric, although the solution is
still very indeterminate:

     T = 1988 Mar. 20.44 TT           Peri. = 123.55
     e =  0.5521                      Node  =  31.94    2000.0
     q = 10.3839 AU                   Incl. =  18.68
       a = 23.1832 AU      n = 0.00883      P = 111.6 years


1993 May 13                    (5789)            Daniel W. E. Green

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