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IAUC 7839: 2002bj; SUNGRAZING COMETS

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                                                  Circular No. 7839
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)


SUPERNOVA 2002bj IN NGC 1821
     Independent discoveries of a supernova in NGC 1821 have been
reported by T. Puckett, Mountain Town, GA, with J. Newton,
Chiefland, FL, on unfiltered CCD frames taken with the Puckett
Observatory 0.60-m automated patrol telescope on Feb. 28.06 (mag
14.8) and Mar. 1.05 UT, and by M. Papenkova and W. D. Li,
University of California at Berkeley, on unfiltered CCD LOTOSS (cf.
IAUC 7514) images taken with the 0.8-m Katzman Automatic Imaging
Telescope (KAIT) on Feb. 28.2 and Mar. 1.2 (mag about 14.7 on both
dates).  Puckett measures the new object at R.A. = 5h11m46s.41,
Decl. = -15o08'10".8 (equinox 2000.0), which is 4".5 east and 5".8
south of the center of NGC 1821; Li provides position end figures
46s.37, 10".7.  Puckett notes that SN 2002bj is not present on
Palomar Sky Survey images taken on 1990 Nov. 25 (limiting mag about
21.0) and 1983 Nov. 6 (limiting mag about 20.3), and Li remarks
that nothing was visible at this location on a KAIT image taken on
2002 Feb. 21.2 (limiting mag about 18.0).


SUNGRAZING COMETS
     Further to IAUCs 7797 and 7807, D. Biesecker and D. Hammer
report their measurements for additional Kreutz sungrazing comets
found on SOHO website images by R. Kracht (the 1999 comets), M.
Meyer (C/2002 C3), T. Hoffman (C/2002 C4), and X. Leprette (C/2002
D1).  The 2002 comets were detected only with the C3 coronagraph;
the 1999 comets were detected only in C2 images.  C/2002 C3 showed
a tail at apparent distance 25 solar radii, while C/2002 C4 was
obscured at < 9.5 solar radii by a coronal mass ejection.  The
reduced astrometry and orbital elements by B. G. Marsden appear on
the MPECs cited below.

  Comet         1999 UT          R.A. (2000) Decl.       MPEC
  C/1999 H8     Apr. 19.938       1 55.5   +10 19       2002-D42
  C/1999 H9          26.254       2 15.7   +11 54       2002-D42
  C/1999 J13    May  13.993       3 24.5   +17 03       2002-D45

  Comet         2002 UT          R.A. (2000) Decl.       MPEC
  C/2002 C3     Feb.  4.654      21 41.4   -19 00       2002-C28
  C/2002 C4          10.906      21 56.6   -15 36       2002-C95
  C/2002 D1          22.029      22 40.9   -11 33       2002-D45

                      (C) Copyright 2002 CBAT
2002 March 1                   (7839)            Daniel W. E. Green

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