Central Bureau for Astronomical Telegrams

Central Bureau for Astronomical Telegrams -- Image credits

IAUC 6684: C/1997 L2; Corr

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 6683 SEARCH Read IAUC 6685

View IAUC 6684 in .dvi or .ps format.
IAUC number 

                                                  Circular No. 6684
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 L2 (SOHO)
     C. St. Cyr, Naval Research Laboratory, reports, for the SOHO-LASCO
Consortium (see IAUC 6669), the discovery of a faint comet in SOHO-LASCO
data by Shane Stezelberger last week.  This comet was moving away from the
sun, and there is again some inconsistency between the data obtained with
the C2 and the C3 coronagraphs.  The comet has no obvious tail.  Positions
(apparent solar distance and position angle) have been measured by D. Lewis
(University of Birmingham), S. Paswaters, St. Cyr and Stezelberger.
These positions have been reduced to the J2000.0 earth-equatorial system
by G. V. Williams and are given in detail on MPEC 1997-M06.  The following
is the approximate position on the first C2 image:

           1997 UT           R.A. (2000) Decl.        m1
           June 10.592       5 15.1      +23 48        5

     This comet is clearly not a Kreutz sungrazer, and the rough parabolic
orbital elements below have been determined by the undersigned.  The
comet is likely to be considerably fainter than suggested in the ephemeris.

     T = 1997 June 10.98 TT           Peri. =  66.39
                                      Node  =  72.79    2000.0
     q = 0.0430 AU                    Incl. =  70.79

1997 TT     R. A. (2000) Decl.     Delta      r    Elong. Phase      m1
June 20     6 07.53    + 5 23.8    0.665    0.438   18.3  133.2     13.5
     21     6 13.15    + 2 34.0    0.650    0.472   21.2  129.0     13.8
     22     6 18.91    - 0 18.0    0.639    0.505   24.1  124.9     14.1
     23     6 24.83    - 3 11.3    0.629    0.538   27.0  121.0     14.3
     24     6 30.90    - 6 05.1    0.622    0.569   29.9  117.1     14.5
     25     6 37.12    - 8 58.3    0.617    0.600   32.8  113.3     14.7
     26     6 43.48    -11 50.0    0.614    0.630   35.7  109.7     14.9
     27     6 49.99    -14 39.3    0.613    0.659   38.5  106.1     15.1
     28     6 56.63    -17 25.3    0.614    0.688   41.3  102.6     15.3
     29     7 03.40    -20 07.1    0.617    0.716   44.0   99.2     15.5
     30     7 10.29    -22 43.9    0.621    0.743   46.7   95.9     15.7
July  1     7 17.31    -25 15.3    0.627    0.771   49.2   92.8     15.9


CORRIGENDUM
     SN 1997by (cf. IAUC 6639, 6640, 6643) is in IC 4252.  On
IAUC 6640, lines 7-8, for parent galaxy Abell 1736 read parent galaxy
in Abell 1736

                      (C) Copyright 1997 CBAT
1997 June 19                   (6684)              Brian G. Marsden

Read IAUC 6683 SEARCH Read IAUC 6685

View IAUC 6684 in .dvi or .ps format.

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

Valid HTML 4.01!