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(meteorobs) Fwd: Leonids: USA "vs" the Eastern Hemisphere


In a message dated 11/23/01 11:39:59 AM Eastern Standard Time, meteors@aon.at 
writes:

<< I feel IMO will need to
 correct the figure for the american peak from 1000 to roughly 2500. 1000
 just seems a very low figure for what we saw from Mt. Lemmon. >>

    I would agree with Jure.  I wasn't on Mt. Lemmon, but 70 miles to the 
south and east, just outside of Benson, Arizona.  It seemed to me that at 
around 11h UT (4:00 a.m. MST) we were seeing Leonids coming at the rate of 
one every 1 to 2 seconds (highly subjective since I wasn't making any 
specific counts -- I was chiefly involved in photography -- but it certainly 
seemed to me that a rate of 1000/hr. would be too low for what we were 
witnessing).

    I'm also forwarding along an E-mail message from Dr. Glenn Schneider of 
the University of Arizona.  Glenn was on Mt. Lemmon for the peak.  Within his 
E-mail he provides a graph of Leonid activity comparing data compiled at Mt. 
Lemmon to Alice Springs.  I don't know if the graph (imbedded within the 
message) will come through on the meteorobs list, but from what the graph 
shows, Arizona beat Australia with a ZHR of ~2700 to 2000.     

 -- joe rao



========== FORWARDED MESSAGE

Date: Tue, 20 Nov 2001 15:22:40 -0700
From: Glenn Schneider <gschneider@mac.com>
Organization: Steward Observatory
To: eclipsechaser@yahoo.com, jrbt@eclipsedot net, KOLODNY@Kolodny-Anteau.com,
        moskowi@attglobaldot net, Skywayinc@aol.com, small.exoticexp@erols.com
Subject: Leonids: USA "vs" the Eastern Hemisphere

Well, looks like it may be a tie.  It appears we had a higher peak
rate, but over a shorter interval...

[snip... Image]

Keep in mind the ZHR is integrated over an hour long window, so the
"instantaneous" rate at/near a peak which is much sharper (narrower)
than an hour can (and is ) much higher.  For storms like this we really
need ZMR (zenithal minutely rate!).  Clearly on Mt. Lemmon each observer
covering only part of the sky was seeing on the order of a couple a
second at the peak.

Looks like we all had a good show all around, but haven't yet heard
from Craig.  Craig? Are you back?

Steve: FYI - The above chart is from the counts reduced by all
those guys clicking away and shouting "druga, druga...", etc.
during the morning.

 -GS-.


[snip... "/Macintosh%20HD/Temporary%20Items/nsmail68.gif"]

------- End of Forwarded Message



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