[meteorite-list] fireball speed

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From: KHe1144783_at_aol.com <KHe1144783_at_meteoritecentral.com>
Date: Thu Apr 22 10:31:25 2004
Message-ID: <1a5.1fb51fcc.2d6a5a71_at_aol.com>

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In a message dated 2/22/2004 8:11:36 AM Pacific Standard Time,
stephen_mcmann_at_hotmail.com writes:

> In general how rapidly must an object travel through the atmosphere to
> produce visible light? Note that don't even know whether one speed can
> approximate an answer, or whether factors such as air density, the shape of the object,
> or the composition of the object have an enormous effect.
>
>

Steve: According to several people on the list, its about 4000 MPH for a
stone and more for an Iron. I believe were talking about the lower altitudes below
20,000 Ft. I'd like to know if there is record of a fall burning all the way
to the ground. Has this ever been recorded ? Kris Henkel, Palm Springs.

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<HTML><HTML>In a message dated 2/22/2004 8:1=
1:36 AM Pacific Standard Time, stephen_mcmann_at_hotmail.com writes: 
 
<BLOCKQUOTE TYPE=3DCITE style=3D"BORDER-LEFT: #0000ff 2px solid; MARGIN-LEFT=
: 5px; MARGIN-RIGHT: 0px; PADDING-LEFT: 5px">In general how rapidly mus=
t an object travel through the atmosphere to produce visible light? Note tha=
t don't even know whether one speed can approximate an answer, or whether fa=
ctors such as air density, the shape of the object, or the composition of th=
e object have an enormous effect. 
 
</BLOCKQUOTE> 
 
Steve: According to several people on the list, its about 4000 MPH for a sto=
ne and more for an Iron. I believe were talking about the lower altitudes be=
low 20,000 Ft. I'd like to know if there is record of a fall burning all the=
way to the ground. Has this ever been recorded ? Kris Henkel, Palm Springs.=
</HTML>

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Received on Sun 22 Feb 2004 02:18:09 PM PST

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