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Re: (meteorobs) Meteorites and Terminal velocity
If you have ever removed both Pyrex and metal containers from the oven you know
how different the temperature of the container feels. It depends on both the
thermal capacity and conductivity of the material. I would think there would be
the same thing with the feel of a stony meteorite and a metallic ones and the
other materials between these extremes.
GeoZay@aol.com wrote:
> In a message dated 12/23/00 1:36:17 PM Pacific Standard Time,
> epmajden@home.com writes:
>
> <<
> Dr. Peter Millman investigated the Benton, N.B. fall which was picked up
> immediately after landing and this meteorite was hot. It was reported to be
> like a hot potato that you couldn't hold comfortably in your hand but could
> toss it from one hand to another. <<
>
> About how hot would this be? 120-150 deg F. range maybe? Not an unreasonable
> possibility. Hot enough to not hold comfortably. Any reports of blistered
> skin from this hand tossing?
>
> >>Other meteorites are cold on landing.
> Dr. Halliday refered me to a paper with the title, "Temperatures of
> Meteoroids in Space" by Clay P. Butler from the U.S, Naval Radiological
> Defence Laboratory in San Francisco, which was published in the Journal,
> METEORITICS, volume 3, 1966 pages 59-70. Meteoroids in a near Earth
> enviroment aren't as cold as one would think.<<
>
> If there was a small accumulation of heat within the meteoroid from solar
> radiation just slightly greater than what drains back into the cold of space,
> wouldn't eventually the meteoroid become so hot that the interior crystal
> structure changes? Has there been any meteorites found with indications of a
> recently remelted and quickly crystalized interior beyond the fusion crust?
>
> >> Believe what you like George, but I think I will accept what the
> professionals say until observational evidence indicates otherwise.
> >>
>
> That's very courteous of you. But from what I can gather there appears to be
> confusion of what's observational evidence with anecdotal "evidence". Did Dr.
> Millman take any temperature measurements of the Benton, NB fall that would
> support the hot potato-like temperatures or was he going strictly by an
> anecdotal story?
> GeoZay
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