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IAUC 6965: C/1998 M6; 88P

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                                                 Circular No. 6965
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 M6 (MONTANI)
     Additional CCD astrometry:

     1998 UT             R.A. (2000) Decl.        m1    Observer
     July  2.43232   20 56 20.71   -17 16 30.5   18.9   Montani
           2.43794   20 56 20.45   -17 16 29.4   19.0     "
           2.44355   20 56 20.15   -17 16 27.8   18.9     "
           2.65638   20 56 10.30   -17 15 40.2   18.3   Sugie
           2.66054   20 56 10.04   -17 15 39.8            "
           2.66263   20 56 09.87   -17 15 39.5            "

J. Montani (Kitt Peak).  0.9-m Spacewatch telescope.
A. Sugie (Dynic Astronomical Observatory).  0.60-m f/3.7 reflector.
  Communicated by S. Nakano.

     Very preliminary parabolic orbital elements by the undersigned
from 15 observations, June 30-July 2:

     T = 1997 Nov. 16.30 TT           Peri. = 337.46
                                      Node  = 306.56    2000.0
     q = 5.7331 AU                    Incl. =  89.11

1998 TT     R. A. (2000) Decl.   Delta     r    Elong. Phase    m1
June 26    21 01.22   -17 40.1   5.119   5.949  141.6    6.1   18.3
July  1    20 57.46   -17 21.7   5.079   5.958  147.1    5.3   18.3
      6    20 53.49   -17 03.5   5.046   5.968  152.7    4.5   18.3
     11    20 49.33   -16 45.4   5.022   5.978  158.4    3.6   18.3
     16    20 45.04   -16 27.4   5.005   5.988  164.0    2.7   18.3
     21    20 40.64   -16 09.4   4.997   5.999  169.6    1.8   18.3
     26    20 36.20   -15 51.4   4.997   6.009  174.8    0.9   18.3


COMET 88P/HOWELL
     Visual m_1 estimates:  Apr. 20.87 UT, 13.6 (K. Hornoch,
Lelekovice, Czech Republic, 0.35-m reflector); 23.95, 14.8 (M.
Lehky, Hradec Kralove, Czech Rep., 0.42-m reflector); May 17.86,
13.4 (M. Reszelski, Szamotuly, Poland, 0.25-m reflector); 22.92,
14.2 (K. Sarneczky, Agasvar, Hungary, 0.44-m reflector); 31.91,
13.8 (Lehky); June 20.91, 13.2 (Lehky); 25.90, 12.4 (Hornoch);
28.19, 13.2 (A. Hale, Cloudcroft, NM, 0.41-m reflector).

                      (C) Copyright 1998 CBAT
1998 July 3                    (6965)            Daniel W. E. Green

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