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IAUC 5376: 1991z

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IAUC number 

                                                  Circular No. 5376
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


PERIODIC COMET SHOEMAKER-LEVY 5 (1991z)
     The following precise positions, measured by C. S. Shoemaker
and J. Alu from exposures with the 0.46-m Palomar Schmidt, involve
prediscovery images identified by Shoemaker on films obtained by H.
E. Holt, T. M. King, K. Lawler, J. Stiffler and K. W. Zeigler (Sept.
12, 17), images from films obtained by Shoemaker, E. M. Shoemaker
and D. H. Levy (Oct. 4, 8) and by K. Lawrence, P. Rose and R.
Bambery (Oct. 11, 14):

     1991 UT             R.A. (1950) Decl.        m1
     Sept.12.36510    0 38 08.09   - 8 18 36.3   16.5
          17.41823    0 35 02.24   - 8 10 18.2
          17.46997    0 35 00.07   - 8 10 11.9
     Oct.  4.35469    0 21 56.65   - 7 20 57.4   16.0
           8.25035    0 18 46.74   - 7 03 13.1
          11.27378    0 16 23.64   - 6 47 28.6   16
          11.29844    0 16 22.34   - 6 47 19.9
          14.28264    0 14 07.82   - 6 30 06.5
          14.30747    0 14 06.72   - 6 29 55.9

     Improved orbital elements from 14 observations Sept. 17-Oct. 14:

     T = 1991 Dec. 13.2346 ET         Peri. =   6.0372
     e = 0.529856                     Node  =  28.9889  1950.0
     q = 1.984423 AU                  Incl. =  11.7562
       a =  4.220888 AU    n = 0.1136576    P =   8.672 years

     1991 ET      R.A. (1950) Decl.     Delta      r       m1
     Oct. 11     0 16.60    - 6 48.9    1.087    2.062    16.4
          21     0 09.66    - 5 44.9
          31     0 05.05    - 4 22.5    1.140    2.021    16.4
     Nov. 10     0 03.46    - 2 43.7
          20     0 05.19    - 0 51.3    1.264    1.995    16.5
          30     0 10.13    + 1 11.4
     Dec. 10     0 17.98    + 3 22.0    1.437    1.985    16.8
          20     0 28.40    + 5 38.2
          30     0 41.00    + 7 57.9    1.641    1.990    17.1


1991 October 24                (5376)             Daniel W. E. Green

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