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IAUC 7711: C/2001 Q4

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                                                  Circular No. 7711
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)
CBAT@CFA.HARVARD.EDU (science)
URL http://cfa-www.harvard.edu/iau/cbat.html  ISSN 0081-0304
Phone 617-495-7440/7244/7444 (for emergency use only)


COMET C/2001 Q4 (NEAT)
     Additional CCD astrometry:

     2001 UT             R.A. (2000) Decl.        m1    Observer
     Aug. 31.72519    2 43 40.21   -25 35 52.1   19.3   Sugie
          31.72755    2 43 40.24   -25 35 52.1            "
          31.72991    2 43 40.17   -25 35 53.8            "
     Sept. 6.39133    2 42 39.82   -26 05 01.3          NEAT
           6.41278    2 42 39.51   -26 05 06.7            "
           6.43443    2 42 39.14   -26 05 14.5            "
           7.40779    2 42 27.37   -26 10 14.6            "
           7.42896    2 42 27.12   -26 10 21.6            "
           7.45084    2 42 26.87   -26 10 27.0            "
           9.45241    2 42 01.31   -26 20 45.0            "
           9.50431    2 42 00.58   -26 21 01.1            "
          10.39848    2 41 48.50   -26 25 38.5            "
          10.40980    2 41 48.41   -26 25 42.1            "
          10.42066    2 41 48.23   -26 25 45.7            "
          10.47832    2 41 47.42   -26 26 03.3            "
          10.48958    2 41 47.24   -26 26 06.3            "
          10.50780    2 41 47.03   -26 26 12.5            "

A. Sugie (Dynic Astronomical Observatory).  Comm. by S. Nakano.
NEAT (Palomar).  1.2-m Schmidt.  Measured by M. Hicks and S. Pravdo.

     The parabolic orbital elements below are from 38 observations,
Aug. 24-Sept. 10.  T is still uncertain by several weeks, but it
appears that this comet may become an easy binocular (and possibly
naked-eye) object in May-June 2004; the ephemeris assumes H = 5.0
and r**-3.

     T = 2004 May  25.993 TT          Peri. =   0.659
                                      Node  = 210.670   2000.0
     q = 1.00055 AU                   Incl. = 100.145

2001 TT     R. A. (2000) Decl.   Delta     r    Elong. Phase    m1
Sept. 8     2 42.33   -26 13.3   9.425  10.032  124.7    4.7   17.4
     18     2 39.87   -27 04.5   9.276   9.959  130.6    4.4   17.3
     28     2 36.70   -27 53.8   9.149   9.886  135.3    4.1   17.3
Oct.  8     2 32.93   -28 39.3   9.046   9.813  138.1    3.9   17.2
     18     2 28.67   -29 19.5   8.968   9.739  138.7    3.9   17.2

                      (C) Copyright 2001 CBAT
2001 September 10              (7711)            Daniel W. E. Green

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