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IAUC 6908: C/1998 K1

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                                                  Circular No. 6908
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 C/1998 K1 (MUELLER)
     Jean Mueller reports her discovery of a comet in the course of the
second Palomar Sky Survey.  The following positions are available:

     1998 UT             R.A. (2000) Decl.        m1    Observer
     May  16.20104   10 38 17.53   +32 34 25.6   17.5   Mueller
          17.32014   10 38 40.0    +32 18 36            Gal
          17.91916   10 38 50.97   +32 09 44.0   16     Ticha
          17.93014   10 38 51.16   +32 09 35.1            "
          18.15106   10 38 55.66   +32 06 24.6   16.4   Hergenrother
          18.27426   10 38 58.08   +32 04 37.7            "

J. Mueller (Palomar).  1.2-m Oschin Schmidt.  Some condensation and a
   very short tail to the east.  Comet near corner of 55-min exposure.
   Measurer Mueller.  Reduction by G. V. Williams.
R. Gal and V. Hradecky (Palomar).  1.5-m reflector + CCD.  Object diffuse
   with tail to the east.  Position deduced as offset from field center.
J. Ticha and M. Tichy (Klet).  0.57-m f/5.2 reflector + CCD.  Measurer
   Tichy.
C. W. Hergenrother (Mt. Hopkins).  1.2-m reflector + CCD.

     The following parabolic orbital elements, by the undersigned,
are quite uncertain:

     T = 1998 May  23.511 TT          Peri. = 145.716
                                      Node  =  14.925   2000.0
     q = 3.73200 AU                   Incl. =  37.770

1998 TT     R. A. (2000) Decl.     Delta      r    Elong. Phase      m1
May  17    10 38.55    +32 23.0    3.549    3.732   92.5   15.7     16.0
     22    10 40.35    +31 11.0    3.612    3.732   88.9   15.7     16.0
     27    10 42.52    +29 58.8    3.677    3.732   85.3   15.7     16.0
June  1    10 45.02    +28 46.5    3.742    3.733   81.7   15.6     16.1
      6    10 47.83    +27 34.3    3.808    3.734   78.2   15.4     16.1
     11    10 50.91    +26 22.3    3.874    3.736   74.7   15.2     16.2
     16    10 54.23    +25 10.5    3.939    3.738   71.2   14.9     16.2
     21    10 57.78    +23 59.1    4.005    3.741   67.8   14.6     16.2
     26    11 01.54    +22 48.1    4.070    3.744   64.4   14.2     16.3

                      (C) Copyright 1998 CBAT
1998 May 18                    (6908)              Brian G. Marsden

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