IAU Central Bureau for Astronomical Telegrams

Central Bureau for Astronomical Telegrams -- Image credits

IAUC 6550: C/1997 C1

The following International Astronomical Union Circular may be linked-to from your own Web pages, but must not otherwise be redistributed (see these notes on the conditions under which circulars are made available on our WWW site).


Read IAUC 6549  SEARCH Read IAUC 6551

View IAUC 6550 in .dvi or .ps format.
IAUC number


                                                  Circular No. 6550
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/cfa/ps/cbat.html
Phone 617-495-7244/7440/7444 (for emergency use only)


COMET C/1997 C1 (GEHRELS)
     Further precise CCD positions have been reported as follows:

     1997 UT             R.A. (2000) Decl.        m1    Observer
     Feb.  2.15372    9 11 06.61   +12 19 34.2   18.0   Offutt
           2.19910    9 11 05.07   +12 19 41.5   18.1     "
           2.50728    9 10 54.60   +12 20 28.6   17.1   Abe
           2.51690    9 10 54.20   +12 20 28.8            "
           2.60463    9 10 51.16   +12 20 41.3          Yan
           2.61329    9 10 50.87   +12 20 43.4   17.8     "
           2.81785    9 10 44.12   +12 21 15.3   18.0   Ticha
           2.82769    9 10 43.84   +12 21 16.5            "
           2.95108    9 10 39.47   +12 21 35.7   17.0   Laurie
           3.00616    9 10 37.57   +12 21 44.7            "
           3.64445    9 10 16.05   +12 23 23.2   17.3   Asami
           3.65579    9 10 15.59   +12 23 23.4            "

W. Offutt (Cloudcroft).  0.6-m f/7 Ritchey-Chretien.  Near-stellar
   condensation about 6", no significant coma, tail discernible
   to about 80" in p.a. 287 deg.
H. Abe (Yatsuka).  0.26-m f/6 reflector.  Communicated by S. Nakano.
H. J. Yan and Y. J. Chen (Xinglong).  0.60-m Schmidt.  Measurer Chen.
J. Ticha and M. Tichy (Klet).  0.57-m f/5.2 reflector.  Measurer Tichy.
S. P. Laurie (Church Stretton).  0.25-m Schmidt-Cassegrain.
A. Asami (Hadano).  0.2-m f/6 reflector.  Communicated by S. Nakano.

     The following very uncertain, parabolic orbital elements are from 20
observations Feb. 1-3.  It seems likely that the comet is of short period.

     T = 1998 Apr. 20.929 TT          Peri. =  31.014
                                      Node  = 203.382   2000.0
     q = 2.17053 AU                   Incl. =   3.269

1997 TT     R. A. (2000) Decl.     Delta      r    Elong. Phase      m1
Feb.  1     9 11.75    +12 16.7    4.128    5.109  174.2    1.1     17.2
      6     9 08.93    +12 29.5    4.084    5.068  176.0    0.8     17.1
     11     9 06.06    +12 42.8    4.048    5.028  171.9    1.6     17.0
     16     9 03.20    +12 56.4    4.021    4.987  166.5    2.6     17.0
     21     9 00.41    +13 09.9    4.000    4.946  160.9    3.7     17.0
     26     8 57.73    +13 23.3    3.988    4.905  155.3    4.8     16.9
Mar.  3     8 55.22    +13 36.3    3.982    4.864  149.7    5.9     16.9

                      (C) Copyright 1997 CBAT
1997 February 3                (6550)              Brian G. Marsden

Read IAUC 6549  SEARCH Read IAUC 6551

View IAUC 6550 in .dvi or .ps format.


Our Web policy. Index to the CBAT/MPC/ICQ pages.


Valid HTML 4.01!