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IAUC 7396: C/2000 G1

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                                                  Circular No. 7396
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  ISSN 0081-0304
Phone 617-495-7244/7440/7444 (for emergency use only)


COMET C/2000 G1 (LINEAR)
     F. Shelly, for the Lincoln Near-Earth Asteroid Research project,
reports, in connection with the discovery yesterday of a fast-moving
object, that Lisa Brown-Manguso noticed that the object showed clear
cometary activity.  The following CCD astrometry is available:

     2000 UT             R.A. (2000) Decl.        m1    Observer
     Apr.  7.45368   18 06 50.72   - 7 26 35.3   17.9   Brown-Manguso
           7.48656   18 06 50.91   - 7 25 13.7   18.3     "
           8.09218   18 07 02.04   - 7 00 18.9   17.6   Ticha
           8.09337   18 07 02.08   - 7 00 15.3            "
           8.09478   18 07 02.04   - 7 00 11.9            "
           8.09581   18 07 01.95   - 7 00 07.8            "
           8.43066   18 07 07.01   - 6 46 31.8   17.5   Hug
           8.43301   18 07 07.01   - 6 46 26.6   17.2     "
           8.43635   18 07 06.97   - 6 46 20.1   17.9     "

L. Brown-Manguso, M. Blythe, F. Shelly, M. Bezpalko, M. Elowitz and R. Huber
   (LINEAR).  1.0-m f/2.15 reflector.  Measurers J. Stuart, H. Viggh,
   R. Sayer and J. B. Evans.  Wide diffuse tail in p.a. 270 deg.
J. Ticha, M. Tichy and Z. Moravec (Klet).  0.57-m f/5.2 reflector.
   Measurer Tichy.  Object diffuse, coma diameter 13".
G. Hug (Eskridge).  0.3-m Schmidt-Cassegrain.  Coma about 1' in diameter
   with sharp condensation (but not starlike), short tail in p.a. 275 deg.

     Parabolic orbital elements follow.  It is very likely that the
comet is short period (with current geocentric distance 0.24 AU).

     T = 2000 Mar.  9.02 TT           Peri. = 341.44
                                      Node  = 194.56    2000.0
     q = 1.0112 AU                    Incl. =  13.77

2000 TT     R. A. (2000) Decl.     Delta      r    Elong. Phase      m1
Apr.  6    18 06.29    - 8 29.1    0.306    1.117  104.4   60.2     16.9
     11    18 07.50    - 5 08.4    0.338    1.155  108.4   55.4     17.3
     16    18 07.01    - 2 25.4    0.371    1.197  112.7   50.7     17.6
     21    18 05.07    - 0 12.8    0.403    1.242  117.2   46.0     18.0
     26    18 01.87    + 1 34.5    0.436    1.290  121.8   41.5     18.3
May   1    17 57.60    + 2 59.5    0.470    1.341  126.5   37.2     18.6
      6    17 52.46    + 4 04.5    0.506    1.395  131.2   33.0     19.0

                      (C) Copyright 2000 CBAT
2000 April 8                   (7396)              Brian G. Marsden

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