[meteorite-list] Chelyabinsk trajectory modeling -- how well did we do? Part 1 of 2

From: Jim Wooddell <jim.wooddell_at_meteoritecentral.com>
Date: Wed, 16 Oct 2013 20:13:38 -0700
Message-ID: <525F55E2.8040507_at_suddenlink.net>

Hi Rob,

It appears on your report that you guys came very close at predicting
the fall areas. This event is the ultimate, so far, to test these
calculations out and learning where these recoveries are actually made
will enforce or modify the formulas. Cool stuff!

Were your coordinates based on a ground track?

Jim



On 10/16/2013 5:42 PM, Matson, Robert D. wrote:
> Hi Jim,
>
>> What factors are used of any to add to the formula to account for
>> the apparent explosion. In one video, that was posted early on,
>> I could thought I could see the main mass coming out of that mess
>> and others changing trajectory.
> It's an illusion. Meteors don't "explode" like fireworks or TNT.
> When they break up, their fragments simply decelerate at different
> rates, primarily as a function of size, and to a lesser extent,
> shape. The main body can appear to "blast through" a cloud of
> this much smaller ablated material that is decelerating more
> rapidly due to its greater cross-section/mass ratio. --Rob
>
>
>
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-- 
Jim Wooddell
jim.wooddell at suddenlink.net
http://pages.suddenlink.net/chondrule/

Received on Wed 16 Oct 2013 11:13:38 PM PDT