[meteorite-list] Seems PF fell on 3/27 and NOT on 3/26...

From: Adam Hupe <adamhupe_at_meteoritecentral.com>
Date: Thu Apr 22 10:22:38 2004
Message-ID: <037501c33297$a825b5c0$b4dbe60c_at_attbi.com>

Hello everybody,

I have no doubt that the Park Forest meteorite hit its retardation point
late in its flight at a very low altitude. There is a video out there that
clearly shows it going below the cloud deck. Remember it hit close to
Midnight and came in at an almost perpendicular angle so there was less
atmosphere for it to travel through. Its velocity was not added to that of
the Earth so it entered at a relatively slow speed. Many pieces show no
sign of a secondary fusion crust. Scientist are currently working on the
velocity in which objects were hit. It was clearly traveling faster than
terminal velocity when it impacted the Jones' and the Garzas' residences.
Also a few pieces imbedded themselves up to a foot in the ground. The
Navaros reported that it smelled like fireworks and was still almost too hot
to touch when it penetrated their house. Several witnesses reported seeing
it flash out below the clouds as well.

All the best,

Adam


----- Original Message -----
From: "Frank Prochaska" <fprochas_at_premier1.net>
To: <meteorite-list_at_meteoritecentral.com>
Sent: Saturday, June 14, 2003 9:47 AM
Subject: RE: [meteorite-list] Seems PF fell on 3/27 and NOT on 3/26...


> Hello all,
>
> I don't believe the point of Mike's post had anything to do with the
> elevation of the terrain in the Park Forest area. The density of the
> atmosphere continues to increase as you travel from above to lower
> elevations. The rate of decrease of the cosmic velocity of a meteoriod
> increases proportionally, and eventually all of the cosmic velocity is
> eliminated (at for all intents and purposed the point of extintion) and
the
> meteoriod continues in free fall (terminal velocity). Only very large
> bodies retain portions of their cosmic velocity all the way to the ground,
> and these bodies would therefore be a true "meteor" and show "flame" all
the
> way to the ground as well as be true cratering events. The mass of PF was
> clearly not anywhere close to the size required for this. But if the
point
> of extinction of PF was only 7000 feet, for a relatively "normal"
meteorite,
> Mike's point is that, with the elevation of many parts of the Earth in
that
> range, we should see similar "normal" meteorites landing in these parts of
> the world with remnants of cosmic velocity, still ablating with very high
> surface temperatures, and so indeed setting grandpa's haybales on fire at
> that surface elevation, among other dramatic consequences. I think Mike
is
> simply pointing out that this is not what we see, and that the extinction
> point for PF sized meteorite must be much higher than 7000 feet.
>
> Frank Prochaska
>
>
>
>
>
> -----Original Message-----
> From: meteorite-list-admin_at_meteoritecentral.com
> [mailto:meteorite-list-admin_at_meteoritecentral.com]On Behalf Of Sterling
> K. Webb
> Sent: Friday, June 13, 2003 9:07 PM
> To: Michael Farmer
> Cc: MeteorHntr_at_aol.com; meteorite-list@meteoritecentral.com
> Subject: Re: [meteorite-list] Seems PF fell on 3/27 and NOT on 3/26...
>
>
> Hi,
>
> If we're talking about Illinois and the Chicago area here,
> the elevation of Lake Michigan at Chicago is 597 feet. In
> general, the lay of the land throughout the state is to gently
> decline to the south. Illinois is essentially flat. The elevation
> of the Mississippi at St. Louis is 440 feet and so on. The
> highest elevation in Illinois is in the far-off northwestern
> tippy-tip at 1235 feet, but that is a Wisconsin hill whose crest
> is a few thousand feet over into Illinois.
>
>
> Sterling K. Webb
> --------------------------------------------------------------------------

--
> --------
>
> Michael Farmer wrote:
>
> > there is no possibility that the fireball extuinguished at that
> > low level. It was bright enough to iluminate through the thin
> > cloud layer. Many parts of the country are higher than 7000
> > feet. If that were the case, then many meteorites would indeed
> > set grandpa's haybales on fire!
> >
> >  Mike Farmer
>
>
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Received on Sat 14 Jun 2003 01:09:03 PM PDT