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IAUC 5434: 1992 AD

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                                                  Circular No. 5434
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


1992 AD
     J. V. Scotti, on behalf of the Spacewatch team, reports the
discovery by D. L. Rabinowitz of a slow-moving asteroidal object on
CCD images taken on Jan. 9 and 10.  The object was subsequently
independently reported by the Shoemakers from films taken on Jan. 1.
Available positions:

     1992 UT             R.A. (2000) Decl.       Mag.   Observer
     Jan.  1.44306    8 13 55.56   +19 40 08.7   18.0   Shoemaker
           1.47951    8 13 54.97   +19 40 11.1            "
           9.37595    8 11 37.72   +19 58 21.7          Rabinowitz
           9.40108    8 11 37.27   +19 58 25.1   17.0     "
           9.42475    8 11 36.81   +19 58 28.8            "
           9.50243    8 11 35.51   +19 58 38.7   16.8   Helin
          10.26864    8 11 21.57   +20 00 26.7          Rabinowitz
          10.28200    8 11 21.33   +20 00 28.5            "
          10.28979    8 11 21.20   +20 00 29.9   17.1     "
          10.50729    8 11 17.27   +20 01 00.9          Helin
          13.28817    8 10 26.15   +20 07 31.2   17.1   Rabinowitz
          13.30324    8 10 25.87   +20 07 33.3            "
          13.31323    8 10 25.66   +20 07 34.5            "
          18.59456    8 08 46.89   +20 20 00.7          McNaught
          18.60329    8 08 46.72   +20 20 02.0            "
          18.61150    8 08 46.57   +20 20 03.0            "
          23.56181    8 07 13.02   +20 31 39.0   16.6   Tholen

C. S. Shoemaker, E. M. Shoemaker, and D. H. Levy (Palomar).  0.46-m
  Schmidt telescope films.  Measured by T. M. King.
D. L. Rabinowitz and J. V. Scotti.  0.91-m Spacewatch telescope.
  Measured by Scotti.  V magnitudes.
E. F. Helin, J. Alu, and K. Lawrence (Palomar).  0.46-m Schmidt
  telescope.  Measured by J. Alu.
R. H. McNaught and L. Frederick (Siding Spring).  1.0-m reflector
  + CCD.
D. Tholen (Mauna Kea).  NASA Infrared Telescope Facility.  V
  magnitude.

     B. E. A. Mueller reports the following magnitudes obtained at
Kitt Peak National Observatory on Jan. 9:  V = 16.86 +/- 0.02, R =
16.11 +/- 0.02, I = 15.35 +/- 0.03; no obvious coma was visible,
though the seeing was poor (2").  Tholen also notes that 1992 AD is
redder than any other minor planet or comet that he has observed in
the past.


1992 January 23                (5434)             Daniel W. E. Green

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