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IAUC 4857: 1989 RS1

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                                                Circular No. 4857
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 RS1
     J. Alu and E. Helin report their discovery of an Amor-type
object on Palomar 0.46-m Schmidt films.  The following observations
are available:

     1989 UT             R.A. (1950) Decl.        V     Observer
     July  7.63020   20 45 35.94   + 1 32 39.7   18     Hughes
           7.67186   20 45 37.28   + 1 33 02.0            "
     Sept. 6.26684   21 54 14.50   - 2 36 08.1          Helin
           6.29132   21 54 17.65   - 2 36 42.2            "
           8.24323   21 59 12.37   - 3 24 40.6            "
          17.39392   22 25 18.61   - 7 16 03.3   15.5   McNaught

S. M. Hughes (Siding Spring).  U.K. Schmidt telescope.  Measured by
  R. H. McNaught.  Prediscovery observation.
E. Helin, B. Roman, C. Mikolajczak, and R. Crockett (Palomar).
  Measured by Alu.  Mag 16.5 on Sept. 6.
R. H. McNaught (Siding Spring).  Uppsala Southern Schmidt telescope.

     Orbital elements by B. G. Marsden, Center for Astrophysics:

     T = 1989 Sept.21.933 ET          Peri. = 180.818
     e = 0.47924                      Node  = 174.111   1950.0
     q = 1.19970 AU                   Incl. =   7.165
       a =  2.30377 AU     n = 0.281868     P =   3.50 years

     1989 ET      R.A. (1950) Decl.     Delta      r       V
     Sept.11    22 06.54    - 4 33.7    0.206    1.206    15.7
          16    22 21.01    - 6 41.3
          21    22 36.66    - 8 44.4    0.206    1.200    15.7
          26    22 53.05    -10 35.6
     Oct.  1    23 09.73    -12 08.1    0.219    1.204    16.0
           6    23 26.27    -13 17.7
          11    23 42.29    -14 02.7    0.244    1.217    16.3
          16    23 57.51    -14 23.9
          21     0 11.76    -14 23.4    0.281    1.240    16.8
          26     0 24.99    -14 04.1
          31     0 37.27    -13 28.6    0.329    1.271    17.2
     Nov.  5     0 48.71    -12 40.0
          10     0 59.42    -11 41.0    0.390    1.309    17.7


1989 September 20              (4857)             Daniel W. E. Green

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