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IAUC 7567: C/2000 Y6, C/2000 Y7; SUNGRAZING COMETS

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                                                  Circular No. 7567
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)


COMETS C/2000 Y6 AND C/2000 Y7 (SOHO)
     Further to IAUC 7565, D. Hammer reports his measurements for
two comets (initial observations given below) that appear to be two
components of an earlier single comet.  C/2000 Y6 and C/2000 Y7
were found by M. Meyer and by S. Hoenig, respectively, in C2
coronagraph data on SOHO website images.  D. Biesecker provides V
magnitudes for C/2000 Y6: Dec. 20.463 UT, 7.8; 20.504, 7.8; 20.580,
7.5; 20.588, 7.6; 20.604, 8.0; 20.646, 8.3.  The reduced
observations and parabolic orbital elements (T = 2000 Dec. 20.85
TT, q = 0.025 AU, Peri. = 88-89 deg, Node = 229 deg, i = 87-89 deg)
by B. G. Marsden, together with a search ephemeris for groundbased
observers, are given on MPEC 2001-B08.

   Comet         2000 UT           R.A. (2000) Decl.
   C/2000 Y6     Dec. 20.454      17 48.7      -23 20
   C/2000 Y7          20.463      17 48.8      -23 19


SUNGRAZING COMETS
     Hammer also reports his measurements for seven additional
Kreutz sungrazing comets, all found in C2 data (except C/2001 A3,
in C3 data) at the SOHO website by T. Scarmato (C/2000 J6), X.
Leprette (C/2000 K7), M. Oates (C/2000 K8, C/2000 Y9), and M.
Boschat (remaining comets).  The reduced observations and orbital
elements by Marsden appear on the MPECs cited below.

  Comet         2000 UT          R.A. (2000) Decl.       MPEC
  C/2000 J6     May  11.410       3 18.1   +16 37       2001-B11
  C/2000 K7          19.160       3 47.4   +18 17       2001-B11
  C/2000 K8          29.788       4 28.5   +20 07       2001-B11
  C/2000 Y5     Dec. 19.736      17 58.8   -25 08       2001-B08
  C/2000 Y8          23.788      18 17.7   -24 52       2001-B08
  C/2000 Y9          25.121      18 23.6   -24 53       2001-B08

  Comet         2001 UT          R.A. (2000) Decl.       MPEC
  C/2001 A3     Jan.  7.971      19 32.6   -24 10       2001-B11

                      (C) Copyright 2001 CBAT
2001 January 19                (7567)            Daniel W. E. Green

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