[meteorite-list] Re Cu meteorite

[Chris Peterson]

I did the math once for a 1 meter sphere of ice, entering at a fairly
shallow angle and at the lower end of the possible speeds. Assuming it could
hold itself together structurally (which is a big if), you should have
something like a 20cm sphere still frozen at the end of ablation.

Chris

*****************************************
Chris L Peterson
Cloudbait Observatory
http://www.cloudbait.com


----- Original Message ----- 
From: "Darren Garrison" <cynapse at charter.net>
To: <meteorite-list at meteoritecentral.com>
Sent: Saturday, July 12, 2008 11:58 AM
Subject: Re: [meteorite-list] Re Cu meteorite


> On Sat, 12 Jul 2008 11:10:04 -0600, you wrote:
>
>>It turns out that even a big block of ice can survive passage through the
>>atmosphere. The outside ablates away, the interior never warms up.
>
> Any numbers on how big the block would have to be?  How small the 
> surviving
> piece could be?  I'm thinking of some of those chunks of ice that fall 
> from the
> sky some times.  Most come from planes.  Could some be cometary?