[meteorite-list] What's the highest meteorite ever found?

From: Robert Verish <bolidechaser_at_meteoritecentral.com>
Date: Thu Apr 22 09:43:33 2004
Message-ID: <20010721181640.89862.qmail_at_web10408.mail.yahoo.com>

Hi Ed,

Thanks for the post with all that information about
various "retardation point" altitudes.

I think this information was obtained from recordings
by the MIAC-MORP network. Other information that was
reduced from these fireballs recordings was the orbits
for these meteoroids. These orbits extend to the
asteroid belt. Direct evidence linking H and LL
chondrites to parent bodies in that part of our solar
system.

See chart here:

http://wwwdsa.uqac.uquebec.ca/~mhiggins/MIAC/morp.htm

Bob V.

P.S. - This kind of information can only be obtained
from fireball recording, such as the network in Canada
that ceased operation over 15 years ago. Since then,
there has been ample advances in electronics and
software to make a new system feasible, if not
cheaper. They currently have a system working in
Europe. If anyone else has an interest in seeing such
a system set up in the Mojave Desert, I would like to
hear from those people.

--__--__--

From: "Ed Majden" <epmajden_at_home.com>
To: "dean bessey" <deanbessey_at_hotmail.com>
Date: Fri, 20 Jul 2001 20:53:44 -0700

Subject: Re: [meteorite-list] What's the highest
meteorite ever found?


    Land height has nothing what ever to do with the
survivability of a meteorite. The atmosphere is more
or less uniform in density as measured from sea level
not the land mass it is over. The survivability of a
meteoroid is dependent on its initial entry velocity,
angle of entry, and type of meteoroid etc. Stones
tend to fracture at higher altitudes than a solid iron
would.
End point velocities, or where ablation stops, are in
the range of 3 to 6 km/sec. End point heights, or
the point where the meteoroid becomes invisible range
from around 5 km to 64 km. The average height is
around 18
km. Pribram had an entry velocity of 18 km/sec with
an end point velocity of ~7 km/sec. It first became
visible at a height of 98 km and ceased to be visible
at 13.3 km. The Lost City meteoroid had an entry
velocity of 14.2 km/sec with an end point velocity of
3.5 km/sec. It became visible at 86 km and ceased to
be visible at 19.5 km.

Ed Majden - American Meteor Society Spectroscopy
Project Coordinator

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Received on Sat 21 Jul 2001 02:16:40 PM PDT