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Re: (meteorobs) Fwd: Have Meteorite, Now Looking for the Fireball
Rob,
I agree with you completely. It is a "good idea" to get these finds age
dated. And lucky for me, I just heard from one of those "research labs" and
they have expressed an interest in making these measurements. Like you, I
wouldn't be surprised if this find turns out to be many times older than my
original estimate. I'll report back when the results are obtained.
My thanks to all the helpful responses that I so promptly received.
Bo*
-------------------------------------------------------------------------
Date: Thu, 17 Jun 1999 10:02:04 +1000 (EST)
From: Rob McNaught < rmn@aaocbn.aaodot gov.au >
To: Meteor Observing Mailing List < meteorobs@jovian.com >
CC: Bolide*chaser < bolidechaser@tripoddot net >
Subject: Re: (meteorobs) Fwd: Have Meteorite, Now Looking for the Fireball
Bo*,
I guess you have done your research, but my *feeling* is that desest
falls
are generally well preserved. As far as I can remember, ages derived
for
Nullarbor meteorites in Australia made them much older than the
weathering
might have initially suggested. It is probably a good idea to have
some
research lab examine one to derive the age it has been shielded from
cosmic rays. Apart from the value of the basic science, it would give
a
better idea when (or if) to look for a related fireball.
Cheers, Rob
Robert H. McNaught
rmn@aaocbn.aaodot gov.au
On Wed, 16 Jun 1999, Lew Gramer wrote:
>
> Please note that Bo* (whoever you are ;>) is not currently a
subscriber
> to 'meteorobs'. So if you wish to reply to this message, please be
sure
> to MANUALLY place 'bolidechaser@tripoddot net ' in your "Cc:" line. By
the
> way, Bo*, have you been in touch with the American Meteor Society or
> the International Meteor Organization Fireball Data Center about
this?
>
> Clear skies and many falls!
> Lew Gramer <owner-meteorobs@jovian.com >
>
>
> ------- Forwarded Message
>
> Date: Tue, 15 Jun 1999 18:48:55 -0700
> From: Bolide*chaser <bolidechaser@tripoddot net>
> To: meteorobs@jovian.com
> Subject: Have Meteorite, Now Looking for the Fireball
>
> At Lew's recent invitation, I've come over from the Meteoritecentral
> mailing list to pay a visit to you Meteorobs.
>
> Usually we chase fireballs with the hope of finding a meteorite. In
> this case I've found a meteorite (H4S3W1), but now I'm trying to
connect
> it to a documented fireball. The "W1" means that its weathering
grade
> is classified as a "1" on a scale of 0 (fell last night) to 7 (100%
> altered to terrestrial minerals). This "W1" suggests that the
fireball
> occurred, at best, a few years ago, but considering it was found in
the
> Mojave Desert, it could have been 30 years ago. So far, 6 pieces
have
> been found, totaling just under 1 kg with the main mass nearly 400
> grams. The larger pieces exhibit ~70% well-formed "primary" fusion
> crust, and ~30% poorly developed "secondary" fusion crust, suggesting
> two, widely spaced fragmentation events. So far, the strewn field is
> ~3.5 km long, very narrow, and trends almost exactly south-to-north.
>
> Now here's a clue. The fireball would have been easily observable
(and
> probably heard) from the Bartsow-Victorville area. If the original
mass
> was large enough and traveled like the long-trending Peekskill
Fireball,
> it could have been witnessed from San Bernardino, Riverside, or even
> Oceanside!
>
> Aside from going through the archives of 30 years worth of San
> Bernardino Co. newspapers, how could I go about researching this?
>
> Suggestions please,
> Bo*
>
> ------- End of Forwarded Message
>
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