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IAUC 4469: 1987y; 1987 SL; 1987 SJ3

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                                                  Circular No. 4469
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


COMET LEVY (1987y)
     T. Seki, Geisei, provides the following precise position:

      1987 UT              R.A. (1950)           Decl.         m1
      Oct. 13.40972     14 46 35.67     +17 05 06.8     10


1987 SL
     The following precise positions were obtained by B. A. Skiff
and E. Bowell at the Lowell Observatory Anderson Mesa Station:

     1987 UT              R.A. (1950) Decl.            Mag.
     Sept.19.32815      1 28 56.75     +24 33 02.9     16.2
          19.37859      1 28 50.24     +24 34 52.0
          29.31404      1 05 59.86     +29 04 57.1     16.2
          29.35941      1 05 53.32     +29 05 52.7

     Improved orbital elements from nine observations Sept. 19-29:

          T = 1987 July 22.282 ET
          W = 319.878                    e =   0.61858
          O = 352.787   1950.0           a =   3.02933 AU
          i =  19.517                    n =   0.186933
          q =   1.15545 AU               P =   5.27 years

     1987 ET      R.A. (1950) Decl.     Delta      r       V
     Oct. 22     0 25.28    +32 27.6    0.642    1.591    16.3
     Nov.  1     0 17.05    +32 13.8    0.746    1.666    16.8
          11     0 14.67    +31 40.7    0.865    1.743    17.3


1987 SJ3
     Correction of the time of the Sept. 30 observation (IAUC
4467) by -1 hour means that this is a Hungaria-type object: T =
1987 July 18.41 ET, W = 315.21, O = 15.48, i = 20.80 (equinox
1950.0), q = 1.6756 AU, e = 0.0963, a = 1.8542 AU, n  = 0.39037.

     1987 ET      R.A. (1950) Decl.     Delta      r       V
     Oct. 12     0 14.43    - 2 38.7    0.729    1.711    15.5
          22    23 59.10    - 0 10.6
     Nov.  1    23 48.65    + 2 16.1    0.842    1.728    16.2
          11    23 43.47    + 4 38.0


1987 October 13                (4469)              Brian G. Marsden

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