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Re: (meteorobs) Clustering (a new approach?)...
Chris Crawford wrote:
>
> Let's consider the formation of that 70 km sphere of meteoroids. We know
> that streams as old as 300 years can still produce big storms, so let's
> assume that the average age of a storm meteoroid is 150 years. Let's further
> assume -- for no good reason -- a "half-life" for breaking up of half that
> time. Thus, the average meteoroid we find broke up 75 years ago.
===============
Well, I was thinking about an average age of just a few months, because
the particles are more prone to break-up when close to the sun. Let's
assume 160 days or so. This would demand a relative velocity of about 5
milimeters per second in a 70 km sphere of probability. Not so bad, in
my opinion. Hey, these assumptions are resembling the uncertainty
principle.
Regarding the motion of the streamers across Earth's surface, each
shower has its oddities indeed. Luckilly it seems that this feature is
easy to calculate because isn't dependent of our suppositions.
Kiko Soares
P. Prudente - Brasil
22.07 S - 51.22 W
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