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IAUC 6949: C/1998 M2

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                                                  Circular No. 6949
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 M2 (LINEAR)
     CCD astrometry is reported of another comet discovered by LINEAR:

     1998 UT             R.A. (2000) Decl.        m1    Observer
     May  28.40143   18 35 29.98   - 5 18 22.6   17.0   Blythe
          28.43816   18 35 27.95   - 5 17 26.0   17.6     "
     June 19.25996   18 12 55.00   + 3 51 56.2   16.9   Shelly
          19.27829   18 12 53.62   + 3 52 17.0            "
          19.94265   18 12 06.81   + 4 08 16.1   16.0   Tichy
          19.94534   18 12 06.67   + 4 08 20.1            "
          20.20518   18 11 48.39   + 4 14 33.2   15.2   Offutt
          20.22171   18 11 47.19   + 4 14 57.9   16.0     "
          20.27988   18 11 43.01   + 4 16 19.6          Balam
          20.28751   18 11 42.47   + 4 16 30.6            "
          20.52118   18 11 26.07   + 4 22 05.0   14.6   Abe
          20.52951   18 11 25.46   + 4 22 17.8            "
          20.53547   18 11 25.03   + 4 22 26.0   14.5   Sugie
          20.53895   18 11 24.78   + 4 22 31.1            "

M. Blythe, F. Shelly and M. Bezpalko (Socorro).  1-m f/2.15 reflector.
   Measurers J. Stuart, H. Viggh and R. Sayer.  May 28 observations are
   prediscovery.  On June 19 there was a tail some 200" long near p.a. 210 deg.
M. Tichy (Klet).  0.57-m f/5.2 reflector.
W. Offutt (Cloudcroft).  0.6-m f/7 reflector.  Tail about 1' in p.a. 200 deg.
D. Balam (Dominion Astrophysical Observatory).  1.8-m reflector.
H. Abe (Yatsuka).  0.26-m f/6.0 reflector.  Communicated by S. Nakano.
A. Sugie (Dynic).  0.6-m f/5 reflector.  0'.6 coma; 4' tail in p.a. 190 deg.

     Parabolic orbital elements from 13 observations May 28-June 20:

     T = 1998 Aug. 10.3901 TT         Peri. =  36.3601
                                      Node  = 260.8857  2000.0
     q = 2.733431 AU                  Incl. =  60.2039

1998 TT     R. A. (2000) Decl.     Delta      r    Elong. Phase      m1
June 21    18 10.87    + 4 33.5    1.846    2.783  151.8    9.9     14.8
     26    18 04.94    + 6 28.8    1.847    2.774  150.0   10.6     14.8
July  1    17 59.05    + 8 16.9    1.856    2.766  147.1   11.5     14.8
      6    17 53.33    + 9 56.6    1.874    2.758  143.5   12.7     14.8
     11    17 47.91    +11 27.2    1.899    2.752  139.5   13.9     14.8
     16    17 42.89    +12 48.4    1.930    2.746  135.2   15.1     14.8

                      (C) Copyright 1998 CBAT
1998 June 20                   (6949)              Brian G. Marsden

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