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IAUC 5136: 1990o

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IAUC number 

                                                  Circular No. 5136
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


COMET SHOEMAKER-LEVY (1990o)
     The following precise positions have been reported:

     1990 UT             R.A. (1950) Decl.        m1    Observer
     Nov. 17.20220    1 47 42.92   + 0 42 57.0          Shao
          17.20500    1 47 42.83   + 0 43 03.0            "
          17.20690    1 47 42.77   + 0 43 07.0            "
          17.53160    1 47 32.59   + 0 54 39.2   14     Sugie
          17.54348    1 47 32.21   + 0 55 02.2            "
          18.27309    1 47 09.40   + 1 20 35.4          Tatum
          18.55000    1 47 01.08   + 1 30 20.2   14     Seki
          18.56430    1 47 00.71   + 1 30 49.0            "

C.-Y. Shao (Oak Ridge).  1.5-m reflector + CCD.
A. Sugie (Dynic Astronomical Observatory).  0.25-m f/3.4 Schmidt.
J. Tatum (Victoria).
T. Seki (Geisei).

     Preliminary parabolic orbital elements by S. Nakano, Sumoto,
Japan, from 9 observations Nov. 15-18:

     T = 1990 Sept.17.382 ET          Peri. = 311.044
                                      Node  =  49.654   1950.0
     q = 1.59507 AU                   Incl. =  27.748

     1990 ET      R.A. (1950) Decl.     Delta      r       m1
     Nov. 15     1 49.02    - 0 36.1    0.848    1.780    12.6
          20     1 46.34    + 2 20.3
          25     1 44.62    + 5 04.6    0.951    1.843    13.0
          30     1 43.86    + 7 36.2
     Dec.  5     1 44.00    + 9 55.5    1.078    1.911    13.5
          10     1 44.98    +12 03.1
          15     1 46.76    +14 00.0    1.226    1.985    13.9
          20     1 49.27    +15 47.3
          25     1 52.45    +17 26.1    1.391    2.064    14.4

     Total visual magnitude estimates:  Nov. 17.25 UT, 12.6 (A.
Hale, Las Cruces, NM, 0.41-m reflector; comet diffuse and moderately
condensed); 19.22, 12.8 (D. Levy, Tucson, AZ, 0.41-m reflector).


1990 November 19               (5136)             Daniel W. E. Green

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