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IAUC 7224: C/1999 N2

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                                                  Circular No. 7224
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 N2 (LYNN)
     Additional CCD astrometry:

     1999 UT             R.A. (2000) Decl.        m2    Observer
     July 14.89331    9 58 15.16   -13 20 30.6   11.7   Jacques
          14.89454    9 58 15.98   -13 20 21.1   11.6     "
          14.89524    9 58 16.47   -13 20 15.6   11.6     "
          14.89590    9 58 16.94   -13 20 10.3   11.6     "
          14.89664    9 58 17.51   -13 20 03.9   11.1     "
          14.92073    9 58 34.48   -13 16 51.8   11.4     "
          14.92247    9 58 35.75   -13 16 37.1   11.3     "
          15.36050   10 03 41.58   -12 18 33.2   14.3   Garradd
          15.36175   10 03 42.46   -12 18 23.0   14.4     "
          15.36219   10 03 42.76   -12 18 19.7   14.4     "
          15.38878   10 04 01.09   -12 14 48.1   12.4   Zoltowski
          15.39245   10 04 03.60   -12 14 18.8   12.4     "
          15.39631   10 04 06.23   -12 13 48.2   12.4     "
          15.40087   10 04 09.37   -12 13 12.0   12.4     "

C. Jacques and L. Duczmal (Wykrota).  0.3-m f/3.3 reflector.
G. J. Garradd (Loomberah).  0.45-m f/5.4 reflector.  Thin ion tail
  in p.a. 141 deg with an apparent disconnection event (starting at
  615" in p.a. 138 deg, continuing for at least 12'); coma diameter
  8'.5.  Rainy conditions.
F. B. Zoltowski (Woomera).  0.30-m f/10 Schmidt-Cassegrain reflector.

     Preliminary parabolic orbital elements by B. G. Marsden:

     T = 1999 July 23.099 TT          Peri. = 357.816
                                      Node  = 254.322   2000.0
     q = 0.76096 AU                   Incl. = 112.443

1999 TT     R. A. (2000) Decl.   Delta     r    Elong. Phase    m1
July 15     9 59.51   -13 06.5   0.580   0.777   49.5   95.9    7.2
     16    10 10.90   -10 54.7   0.591   0.774   49.3   95.4    7.2
     17    10 21.61   - 8 45.5   0.603   0.770   49.1   94.7    7.3
     18    10 31.65   - 6 40.0   0.618   0.768   48.9   93.7    7.3
     19    10 41.03   - 4 39.1   0.634   0.765   48.8   92.7    7.3
     20    10 49.79   - 2 43.3   0.652   0.763   48.7   91.4    7.4
     21    10 57.95   - 0 52.8   0.671   0.762   48.6   90.1    7.5

                      (C) Copyright 1999 CBAT
1999 July 15                   (7224)            Daniel W. E. Green

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