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RE: (meteorobs) update Nov 18 7:20 UTC Leonid peak (ZHR ~800?!)
I also had a peak ZHR of 700 at 07:06 UT and another of ~600 at 08:06, but corrections and errors are large due to my poor (but accurate) LM
Wayne
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From: Marco Langbroek[SMTP:M.Langbroek@rulpre.LeidenUnivdot nl]
Sent: Wednesday, November 29, 2000 4:31 AM
To: meteorobs@jovian.com; imo-news@imodot net
Subject: (meteorobs) update Nov 18 7:20 UTC Leonid peak (ZHR ~800?!)
Folks,
With the help of Carl, I last night extended the American part
of the ZHR diagram on my website
(http://homes.dsldot nl/~marcolan/leoY2K.html) with data by Pierre
Martin (Canada). These match those of Norman McLeod very well,
again suggesting peak ZHR's in the order of ~800 near 7:20 UTC
(Nov. 18). This compares to ZHR ~350 for the 3:25 UTC European
peak. These values actually match well the predictions by
Lyytinen and Van Flandern (ZHR ~700 for the 4 revs. trail).
Perceptions have been taken into account in the calculations.
The ascending slope of the American data fits well to the last
part of our data from Portugal: you see a trend setting in in
our data and smoothly continuing in the American data!
The result is a major symmetric peak centered at 7:20 UTC and
another major but lesser peak centered at 3:25 UTC. And there
appears to be "something" of short duration near 2:00 UTC.
- Marco Langbroek
Dutch Meteor Society (DMS)
----------------------------------------------------------
Marco Langbroek
Faculty of Archaeology tel. +31 71 5272926/25
Leiden University fax +31 71 5272928
P.O. Box 9515 m.langbroek@arch.leidenunivdot nl
NL-2300 RA Leiden
The Netherlands http://homes.dsldot nl/~marcolan
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end
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