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  Circular No. 7755
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)

LEONID METEORS 2001

  A strong showing of Leonid meteors on Nov. 18 has been
reported by observers in North America and in eastern Asia and
Australia.  Visual observations by D. W. E. Green (Lexington,
MA) and A. Hale (Cloudcroft, NM, despite clouds) indicate a peak around
Nov. 18.43 UT with perhaps 5-15 Leonids per minute;
there is some indication that this peak extended to about Nov.
18.46.  This first peak occurred close to or about half an hour
later than the time predicted by Lyytinen et al. (2001, WGN 29,
110) and about half an hour to an hour later than that redicted
by McNaught and Asher (2001, WGN 29, 156), based on ejection
from comet 55P/Tempel-Tuttle seven revolutions ago.  Rates
continued at an elevated level of a couple to several Leonids
per minute during Nov. 18.5-18.7, according to S. J. O´Meara (Mauna Kea,
HI), D. O´Meara (Volcano, HI), K. Mameta (Kobe,
Japan), and S. Nakano (Sumoto, Japan). Mameta reports that a peak rate
occurred of 55 Leonids per minute occurred over 10
minutes at Nov. 18.764, and Nakano reports that 4-6 Leonids per
second were visible around maximum; by Nov. 18.81, Nakano notes
that the rate dropped to about 5-10 Leonids per minute.  This
second peak occurred close to the times predicted by Lyytinen et al. and
by McNaught and Asher, based on ejection from
55P four revolutions ago.

[...]

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