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IAUC 6928: P/1998 K6

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                                                  Circular No. 6928
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
BMARSDEN@CFA.HARVARD.EDU or DGREEN@CFA.HARVARD.EDU (science)
URL http://cfa-www.harvard.edu/iau/cbat.html
Phone 617-495-7244/7440/7444 (for emergency use only)


COMET P/1998 K6 (SHOEMAKER-LEVY 2)
     C. W. Hergenrother reports his recovery of comet P/1990 UL3
(= 1990p = 1990 XVI) with the Smithsonian Astrophysical Observatory's
1.2-m reflector at Mt. Hopkins.  The comet appears stellar, although
the observations were made through moderate cirrus.  The indicated
correction to the prediction by S. Nakano on MPC 29881 is Delta T
= -0.5 day.

     1998 UT             R.A. (2000) Decl.        m2
     May  19.35584   16 17 28.53   -20 20 43.7   21.0
          19.35971   16 17 28.37   -20 20 42.8   21.0
          19.36359   16 17 28.21   -20 20 42.7   21.0
          20.32096   16 16 50.24   -20 18 41.0   21.0
          20.32483   16 16 50.13   -20 18 40.4   21.3
          20.32869   16 16 49.98   -20 18 39.8   21.5

     The following improved orbital elements, by the undersigned,
satisfy 27 observations 1990-1998 with mean residual 0".7:

                    Epoch = 2000 Feb. 26.0 TT
     T = 2000 Feb.  6.0494 TT         Peri. = 142.0314
     e = 0.579784                     Node  = 234.7521  2000.0
     q = 1.868674 AU                  Incl. =   4.6570
       a =  4.446936 AU    n = 0.1051024    P =   9.378 years

1998 TT     R. A. (2000) Decl.     Delta      r    Elong. Phase      m2
May  27    16 12.33    -20 04.1    3.794    4.807  178.7    0.3     21.4
June  6    16 05.55    -19 41.6    3.766    4.764  168.0    2.5     21.5
     16    15 59.12    -19 19.5    3.768    4.720  156.9    4.8     21.7
     26    15 53.44    -18 59.4    3.798    4.675  146.0    7.0     21.8
July  6    15 48.88    -18 42.6    3.851    4.630  135.4    8.9     21.9
     16    15 45.67    -18 30.1    3.925    4.585  125.0   10.5     21.9
     26    15 43.95    -18 22.7    4.014    4.539  115.1   11.7     22.0
Aug.  5    15 43.77    -18 20.6    4.114    4.492  105.5   12.6     22.1
     15    15 45.12    -18 23.7    4.220    4.445   96.2   13.1     22.1
     25    15 47.95    -18 31.6    4.328    4.397   87.3   13.3     22.2
Sept. 4    15 52.16    -18 43.6    4.435    4.349   78.6   13.1     22.2
     14    15 57.66    -18 58.9    4.536    4.301   70.2   12.7     22.2
     24    16 04.34    -19 16.8    4.628    4.252   62.1   12.0     22.2
Oct.  4    16 12.10    -19 36.3    4.710    4.202   54.1   11.1     22.2

                      (C) Copyright 1998 CBAT
1998 June 2                    (6928)              Brian G. Marsden

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