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IAUC 7439: SUNGRAZING COMETS; C/1999 S4

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                                                  Circular No. 7439
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  ISSN 0081-0304
Phone 617-495-7244/7440/7444 (for emergency use only)


SUNGRAZING COMETS
     D. A. Biesecker, Emergent Information Technologies, Inc., and
Goddard Space Flight Center, reports observations of thirteen
additional Kreutz sungrazing comets detected by SOHO with the C2
telescope, with measurements by D. Hammer and Biesecker (the
reductions and orbital elements by B. G. Marsden appearing on the
MPECs specified below).  None of the objects showed a tail.  All of
the comets were found via the SOHO website by M. Oates except for
C/2000 L2, which was found by M. Boschat; Boschat and X. Leprette
also found C/2000 L3.

   1999 UT        R.A. (2000) Decl.     MPEC      Comet
   May  5.326     2 52.3    +14 53   2000-L46    C/1999 J7
        7.726     3 01.0    +15 29   2000-L47    C/1999 J8
        9.226     3 06.6    +15 54   2000-L48    C/1999 J9
       10.976     3 12.9    +16 17   2000-L49    C/1999 J10
       14.504     3 26.6    +17 09   2000-L50    C/1999 J11
       19.960     3 46.9    +18 29   2000-L51    C/1999 K11
       23.563     3 59.9    +18 54   2000-L52    C/1999 K12
       24.327     4 01.4    +18 53   2000-L53    C/1999 K13
       27.976     4 17.6    +19 41   2000-L54    C/1999 K14
       28.810     4 21.3    +19 49   2000-L55    C/1999 K15

   2000 UT        R.A. (2000) Decl.     MPEC      Comet
   June 3.479     4 46.7    +20 41   2000-L56    C/2000 L1
        9.813     5 10.9    +21 10   2000-L57    C/2000 L2
       10.165     5 12.8    +21 17   2000-L58    C/2000 L3


COMET C/1999 S4 (LINEAR)
     Visual m_1 estimates:  June 1.10 UT, 10.5 (C. Segarra,
Algimia, Spain, 0.25-m reflector); 4.31, 10.4 (P. M. Raymundo,
Salvador, Brazil, 0.25-m reflector); 6.75, 9.4 (S. Yoshida,
Ibaraki, Japan, 0.25-m reflector); 9.07, 9.4 (W. Hasubick,
Buchloe, Germany, 25x100 binoculars); 11.98, 9.3 (A. Baransky,
Kiev, Ukraine, 0.2-m reflector); 14.15, 8.9 (A. Pereira, Cabo da
Roca, Portugal, 14x100 binoculars).

                      (C) Copyright 2000 CBAT
2000 June 14                   (7439)            Daniel W. E. Green

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