(meteorobs) Final Report on fireball.

[Larry]

----- Original Message ----- 
From: "Chris Peterson" <clp at alumni.caltech.edu>
To: "Global Meteor Observing Forum" <meteorobs at meteorobs.org>
Sent: 2009/09/22 21:26
Subject: Re: (meteorobs) Final Report on fireball.


> The fireball is luminous through a vertical distance of about 35 km. The
> angle of approach is not very oblique. These characteristics can be
> determined (within a fairly narrow range) since the speed of the meteor 
> and
> its distance from the radiant are precisely known, and its height when 
> first
> becoming luminous can be reasonably estimated.
>
> In fact, using the same geometric calculations mentioned above, it is easy
> to determine that the meteor duration was 2-3 seconds. This is also
> consistent with typical fireball durations for fast meteoroid streams. A 
> 5-7
> second duration would require a much shallower path, and would be unusual
> for a 66 km/s stream. Such long events usually suggest a much slower, more
> massive body.
>
> Chris
>

I guess what I am trying to say is that if you can have mass sorting within 
the broad band of a radiant meteoroid stream, then you can have velocity 
sorting and even inclination sorting.

There is one other photograph on the authors (website) of a meteor taken at 
the same time with the same camera. I am hard pressed to assume it MUST be 
identicle in every respect, and there is little chance of a variant within 
the shower.

"Meteor Socialism" throws out the high and the low for an average and 
eliminates all  meteoroids that might be near 1/2  or 2/3rds velocity.  :-)

Larry

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