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IAUC 4238: 1983 RD

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IAUC number 

                                                  Circular No. 4238
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
TWX 710-320-6842 ASTROGRAM CAM    Telephone 617-495-7244/7440/7444


1983 RD
     This Amor-type object has been recovered by T. Gehrels and J.
Scotti with the SPACEWATCH camera 0.91-m telescope on Kitt Peak:

     1986 UT             R.A.   (1950.0)    Decl.       V

     July 27.23654     19 29 18.24     + 8 37 01.1     16.5
          27.26911     19 29 16.72     + 8 37 04.3
          30.27667     19 26 53.82     + 8 40 05.8
          30.28435     19 26 53.39     + 8 40 05.8
          30.29259     19 26 52.92     + 8 40 05.8

     The indicated correction to the prediction on MPC 10552 (elements
on MPC 8534) is Delta-T = +0.17 day.  The following improved orbital
elements have been derived by C. M. Bardwell, Center for
Astrophysics, from 56 observations 1983 Sept. 7-1986 July 30:

         T = 1986 Oct. 4.9539 ET     Epoch = 1986 Oct. 17.0 ET
     Peri. = 192.9616                    e =   0.487380
     Node  = 173.3985   1950.0           a =   2.091221 AU
     Incl. =   9.5195                    n =   0.3259149
         q =   1.072002 AU               P =   3.024 years

     1986 ET     R.A. (1950.0) Decl.      p        r       V

     July 29    19 27.96    + 8 39.0    0.335    1.312    16.2
     Aug.  8    19 20.48    + 8 08.7
          18    19 15.85    + 6 08.5    0.242    1.202    15.6
          28    19 17.12    + 2 19.6
     Sept. 7    19 28.09    - 3 46.4    0.170    1.119    15.0

          12    19 38.94    - 7 52.0
          17    19 54.67    -12 44.3    0.142    1.092    14.6
          22    20 16.54    -18 22.3
          27    20 46.13    -24 32.8    0.123    1.076    14.3
     Oct.  2    21 24.75    -30 41.1
           7    22 12.23    -35 52.3    0.119    1.072    14.2
          12    23 05.22    -39 12.9
          17    23 57.50    -40 23.2    0.132    1.081    14.4
          22     0 43.37    -39 44.1
          27     1 20.42    -37 53.8    0.161    1.102    14.8

     Nov.  6     2 11.09    -32 38.9    0.201    1.133    15.2
          16     2 41.40    -26 54.3
          26     3 01.04    -21 19.5    0.306    1.223    16.1


1986 July 31                   (4238)              Brian G. Marsden

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