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IAUC 7376: COMET C/2000 E1 (SOHO); SUNGRAZING COMETS; 1999 LD_31

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                                                  Circular No. 7376
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)


COMET C/2000 E1 (SOHO)
    D. A. Biesecker, SM&A Corporation and Goddard Space Flight
Center, reports that several people browsing the SOHO Web site
(including M. Meyer, M. Boschat, T. Harincar, and M. Oates) noted
another Kreutz sungrazing comet in SOHO LASCO data.  Observed in
both the C2 and C3 telescope data, this object showed a tail of
length about 10'.  Astrometry and parabolic orbital elements appear
on MPEC 2000-E27.

     2000 UT           R.A. (2000) Decl.
     Mar.  4.404     23 27.4       - 7 27


SUNGRAZING COMETS
     Biesecker also reports observations (measures by D. Hammer and
himself, reductions by B. G. Marsden) of some older Kreutz
sungrazing comets seen in SOHO C3 data; full astrometry and
parabolic orbital elements appear on the MPECs indicated below.
Comet C/1999 O2 developed a short tail, C/1999 O3 had a short tail
evident, C/1999 Q3 showed a tail, and C/1999 R3 showed evidence for
a tail; the other four comets showed no evident tail.  Comets
C/1999 O2 and C/1999 P4 were discovered by D. Lewis, C/1999 P5 by
A. Vourlidas, C/1999 Q2 and C/1999 R3 by K. Schenk, and C/1999 Q3
by Biesecker, while comets C/1999 O3 and C/1999 Q1 were first noted
by T. Lovejoy via the SOHO Web page.

   1999 UT        R.A. (2000) Decl.     MPEC      Comet
   July 21.888     7 49.5    +18 13   2000-E28    C/1999 O2
        31.446     8 22.4    +16 25   2000-E29    C/1999 O3
   Aug.  9.429     8 58.2    +14 39   2000-E30    C/1999 P4
        12.138     9 06.3    +13 30   2000-E31    C/1999 P5
        23.821     9 51.1    +10 39   2000-E32    C/1999 Q1
        24.471     9 54.2    +10 11   2000-E33    C/1999 Q2
        30.738    10 10.4    + 7 49   2000-E34    C/1999 Q3
   Sept. 4.863    10 25.5    + 5 40   2000-E35    C/1999 R3


1999 LD_31
     R. P. Binzel, Massachusetts Institute of Technology, reports
that 0.5-1.0-micron spectra of 1999 LD_31, obtained on Mar. 1.3 UT
using the Kitt Peak 4-m reflector, display a constant reflectance
spectral slope of 0.12 +/- 0.02 per 100 nm (consistent with that of
a typical D-type minor planet).

                      (C) Copyright 2000 CBAT
2000 March 7                   (7376)            Daniel W. E. Green

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