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IAUC 4702: 1989 AC

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IAUC number 

                                                  Circular No. 4702
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


1989 AC
     It appears that the observations on IAUC 4701 are reversed, i.e.,
the object is moving to the north and east.  Further observations follow:

     1989 UT             R.A. (1950) Decl.       Mag.   Observer
     Jan.  3.218      3 16.2       +16 20        11.5   Helin
           6.09052    3 50 57.46   +18 35 19.7          McCrosky
           6.24111    3 52 33.26   +18 41 06.2            "

E. Helin, R. Helin, B. Roman and R. Crockett (Palomar).  0.46-m
   Schmidt.  Prediscovery image near edge of film.
R. E. McCrosky (Oak Ridge Observatory).  1.5-m reflector.  The
   first position refers to the beginning of a very poor trail.  The
   object is noticeably brighter than mag 15.  Measurer C.-Y. Shao.

     The object appears to be of Apollo type, and the following orbital
elements are representative of a range of possibilities.  Indeterminacy
is likely to remain because of the obviously very low value of i.

     T = 1988 Nov. 15.14 ET           Peri. = 258.80
     e = 0.5208                       Node  = 133.42    1950.0
     q = 0.8500 AU                    Incl. =   0.35
       a =  1.7737 AU      n = 0.41725      P =   2.36 years

     1989 ET      R.A. (1950) Decl.     Delta      r        V
     Jan.  4     3 26.13    +16 58.3    0.121    1.066    11.1
           5     3 38.50    +17 48.5
           6     3 49.96    +18 32.1    0.133    1.080    11.2
           7     4 00.57    +19 09.8
           8     4 10.39    +19 42.4    0.146    1.095    11.4
           9     4 19.49    +20 10.6
          10     4 27.91    +20 35.0    0.160    1.110    11.5
          11     4 35.73    +20 56.1
          12     4 43.00    +21 14.5    0.175    1.125    11.7
          13     4 49.78    +21 30.5
          14     4 56.09    +21 44.4    0.191    1.140    11.9
          15     5 02.01    +21 56.5
          16     5 07.54    +22 07.1    0.207    1.155    12.1
          17     5 12.75    +22 16.3
          18     5 17.65    +22 24.4    0.225    1.171    12.3


1989 January 6                 (4702)              Brian G. Marsden

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