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(meteorobs) Re: Leonid eZHR question, plus others



Wayne wrote:

> However, with LM +4.2 and a one minute count of 22, that's 
> not out of line. I'm sure my highest one minute count of 
> 18 would translate close to 3000.  ...  When I ran my 
> rough EZHR's yesterday I used a 15 minute bin. And as I 
> stated, that was really pressing the envelope. I used that 
> to figure peak times, not actual ZHR's.

Thanks very much Wayne!  That really helps.  When I checked 
with 15-, 20-, and 30-minute "bins" (kind of like moving 
averages), I still got big eZHR numbers, but I can see 
there's an averaging effect that still leaves in highs and 
lows.  One thing is clear, that I should have tried to 
continue without a break for a while longer, since they 
were still going strong at 11:00:00 UTC!  

I wonder if the LM does not tell the full story when it's 
foggy, if point sources (stars) can't be resolved and thus
can't be counted towards LM, but a moving and/or extended 
object like a meteor can, even though its magnitude is 
comparable to a star that can't be resolved.

Final couple of details on my observations.  During the 
77-minute period 9:43:00 to 11:00:00 I wrote down six 
fireballs of -6 or brighter, two "B" for "terminal burst", 
and two "P" for "persistent train".  I suspect they are 
all low counts.  Also, when I saw two or more meteors at 
once, I'd underline my marks.  I underlined 23 pairs, one 
triple, and one quadruple.  I don't claim that those are 
complete or accurate (especially the negative magnitude 
estimates), but they are in the category of "I at least 
saw these."

I'm about to take off for the USA holiday, and so to 
whomever it's appropriate/relevant -- Happy Thanksgiving!

And as always to all: clear, dark nights --

Ed Cannon - ecannon@mail.utexasdot edu - Austin, Texas, USA
http://wwwvms.utexasdot edu/~ecannon/meteorlinks.html

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