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IAUC 7140: C/1999 G1

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                                                  Circular No. 7140
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/1999 G1 (LINEAR)
     Selected CCD observations of a new comet discovered by LINEAR:

     1999 UT             R.A. (2000) Decl.        m1    Observer
     Apr.  7.23782   13 37 55.16   - 2 33 04.1   18.9   Elowitz
           7.25151   13 37 54.22   - 2 33 11.6   19.2     "
           7.27893   13 37 52.29   - 2 33 19.1   19.3     "
           9.04341   13 35 51.79   - 2 40 16.9          Kornos
           9.06174   13 35 50.57   - 2 40 20.1            "
           9.31463   13 35 33.28   - 2 41 18.7   18.7   Elowitz
           9.37161   13 35 29.41   - 2 41 31.7   19.0     "
          10.02802   13 34 44.65   - 2 44 10.5   17.5   Ticha
          10.03822   13 34 43.94   - 2 44 13.1   17.6     "
          10.07017   13 34 41.59   - 2 44 18.5          Sarounova
          10.07711   13 34 41.11   - 2 44 21.0   17.0     "
          10.00249   13 34 46.28   - 2 44 03.9   17.5   Kornos
          10.01150   13 34 45.66   - 2 44 07.0            "
          10.56586   13 34 07.72   - 2 46 13.9   18.2   Zoltowski
          10.58207   13 34 06.65   - 2 46 18.1   18.1     "

M. Elowitz, M. Blythe, F. Shelly and M. Bezpalko (LINEAR).  1-m f/2.15
   GEODSS telescope.  Measured by J. Stuart, H. Viggh and R. Sayer.
   Object faint, but obvious tail in p.a. 355 deg (Apr. 7).
L. Kornos, S. Gajdos and D. Kalmancok (Modra).  0.6-m f/5.5 reflector.
J. Ticha and M. Tichy (Klet).  0.57-m f/5.2 reflector.  Coma diameter about 6".
L. Sarounova (Ondrejov).  0.65-m f/3.6 reflector.  Small coma; distinct
   fan tail 1' long in p.a. 350 deg.  m2 = 18.6.
F. B. Zoltowski (Woomera).  0.3-m f/3.3 Schmidt-Cassegrain.  Somewhat
   condensed coma; narrow tail about 1' long in p.a. 350 deg.

     Uncertain parabolic orbital elements from 14 observations Apr. 7-10:

     T = 1998 Sept.22.47 TT           Peri. = 145.75
                                      Node  =  23.07    2000.0
     q = 4.3900 AU                    Incl. =  81.13

1999 TT     R. A. (2000) Decl.     Delta      r    Elong. Phase      m1
Apr.  7    13 38.19    - 2 32.2    3.685    4.674  170.1    2.1     17.0
     12    13 32.49    - 2 52.0    3.691    4.688  173.6    1.4     17.0
     17    13 26.80    - 3 12.2    3.706    4.702  172.4    1.6     17.1
     22    13 21.19    - 3 32.9    3.730    4.717  167.7    2.6     17.1

                      (C) Copyright 1999 CBAT
1999 April 10                  (7140)              Brian G. Marsden

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