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IAUC 5462: 1992 AD

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                                                  Circular No. 5462
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
     The following additional positions have been measured by T. M.
King and C. S. Shoemaker from images of a candidate for 1992 AD
identified on photographs obtained by C. S. and E. M. Shoemaker and
D. H. Levy with the 0.46-m Schmidt telescope at Palomar:

     1991 UT             R.A. (2000) Decl.       Mag.
     Jan. 19.23874    6 48 31.29   +15 00 48.1   17.6
          19.27951    6 48 30.40   +15 00 53.3

As a result of the above tentative identification, J. Mueller
reports positions of images she found on 1.2-m Oschin Schmidt plates
taken by C. Brewer and J. D. Mendenhall in the course of the second
Palomar Sky Survey:

     1989 UT             R.A. (2000) Decl.
     Nov.  6.37014    5 57 28.92   + 7 35 07.1
           6.39097    5 57 28.74   + 7 35 06.4
           6.41181    5 57 28.56   + 7 35 05.8

     The following orbital elements by G. V. Williams, Center for
Astrophysics, satisfy the above observations and 35 more in 1992:

                    Epoch = 1992 June 27.0 TT
     T = 1991 Sept.26.6575 TT         Peri. = 354.8881
     e = 0.575547                     Node  = 119.3837  2000.0
     q = 8.686032 AU                  Incl. =  24.6825
       a = 20.464038 AU    n = 0.0106468    P =  92.574 years

1992 TT    R. A. (2000) Decl.     Delta     r    Elong. Phase    V
Feb. 28    7 57.80    +21 46.2    7.947   8.713  138.4    4.3   17.1
Mar.  9    7 56.33    +22 02.5    8.070   8.716  128.0    5.2   17.2
     19    7 55.60    +22 16.2    8.211   8.720  117.8    5.8   17.2
     29    7 55.66    +22 27.2    8.366   8.724  107.9    6.3   17.3
Apr.  8    7 56.51    +22 35.5    8.529   8.728   98.2    6.5   17.4
     18    7 58.15    +22 41.1    8.697   8.733   88.8    6.6   17.4
     28    8 00.54    +22 44.3    8.864   8.738   79.5    6.5   17.4
May   8    8 03.61    +22 45.0    9.027   8.743   70.5    6.2   17.5
     18    8 07.29    +22 43.5    9.181   8.748   61.7    5.8   17.5


1992 March 2                   (5462)             Daniel W. E. Green

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