[meteorite-list] 25143 Itokawa and meteorites

From: MexicoDoug <mexicodoug_at_meteoritecentral.com>
Date: Fri, 26 Aug 2011 12:48:29 -0400
Message-ID: <8CE32271E12BC7A-1FE8-5803_at_webmail-m046.sysops.aol.com>

Thanks David for the reply, Al, Martin, Listers,

As for Vesta, because it is differentiated, it is unlikely to have any
intact chondrules to source, but as an HED source, its the best bet
we've got for parent bodies. Like you say, Itokawa is so small and
already considered a rubble pile. Just to think all that rubble
assembled there, and how many other asteroids seem to share its class,
yet on another scale, it would be like the Native American's asking
Colombus if he were the parent body for all the Europeans just because
they met him (first)!

Kindest wishes
Doug


-----Original Message-----
From: David R Childs <david.childs7 at btinternet.com>
To: meteorite-list at meteoritecentral.com
Cc: almitt at kconline.com; karrnaka at email.de
Sent: Fri, Aug 26, 2011 12:12 pm
Subject: Re: [meteorite-list] 25143 Itokawa and meteorites


Itokowa as Doug has said, is only a couple of blocks' size, and I
certainly have not heard of Itokowa suggested as source of anything,
except the Japanese did land something on it a while back and took some
samples.?
I would suggest ther source of LL's would MORE than likely be from
Vesta, as it seems that Vesta is the best candidate for a lot more as
well.?
?
Best Wishes?
David R Childs?
IMCA 5112?
----- Original Message ----- From: "MexicoDoug" <mexicodoug at aim.com>?
To: <almitt at kconline.com>; <karmaka at email.de>;
<meteorite-list at meteoritecentral.com>?
Sent: Friday, August 26, 2011 4:20 PM?
Subject: Re: [meteorite-list] 25143 Itokawa and meteorites?
?
> Isn't this exciting news Al & Martin!?
>?
> Al from wikipedia:?
> "S-type asteroids are of a siliceous (stony) composition, hence the
name. > Approximately 17% of asteroids are of this type, making it the
second most > common after the C-type."?
>?
> and from the Nature link:?
> "S-types are commonly found on the inner fringes of the belt,"?
>?
> So it is not fair to call puny Itokawa even one of many "parent body"
> asteroids; only that a reasonable composition match for LL chondrites
was > found in what might be representative of its surface dust. The
asteroid > is only 2 X 2 X 6 city blocks in size or so ... but
interesting since its > orbit gets closer to our neighborhood.?
>?
> There is a case for all Vestoids being from Vesta, but such a common
> origin has not (yet?) been identified for S-type asteroids. With the
> exception of Vesta, no asteroid parent bodies are suspected with any
> certainty to be such grand-parent bodies. Grandparent, meaning it is
> directly linked ... rather than one of a billion possibilities. It
is > extremely unlike that "all LL's" are from Itokawa and probably
unlikely > that *any* are from it as well.?
>?
> al wrote:?
> "Wonder if all the LL's are from Itokawa or if we have more than one
> parent body source for those?? "?
>?
> Kindest wishes?
> Doug?
>?
>?
>?
>?
> -----Original Message-----?
> From: al mitt <almitt at kconline.com>?
> To: karmaka <karmaka at email.de>; meteorite-list at meteoritecentral.com?
> Sent: Fri, Aug 26, 2011 9:02 am?
> Subject: Re: [meteorite-list] 25143 Itokawa and meteorites?
>?
>?
> Greetings,?
> So Itokawa is the parent body of the LL chondrites. Asteroid Hebe is
> thought (by spectra) to be the parent body of most or all the H >
chondrites. Asteroid Eros the L4 chondrites and Asteroid Bozemcova the
L6 > chondrites.?
> Wonder if all the LL's are from Itokawa or if we have more than one
parent > body source for those???
> Best!?
> --AL Mitterling?
> ----- Original Message ----- From: "karmaka" <karmaka at email.de> To: >
<meteorite-list at meteoritecentral.com> Sent: Thursday, August 25, 2011
2:40 > PM Subject: [meteorite-list] 25143 Itokawa and meteorites?
>> Hello list here some interesting new articles about the analysis of
the >> Itokawa matter:?
>
http://www.space.com/12733-earth-meteorites-stony-asteroid-mystery.html?
>>?
>>?
>>?
>
http://www.physorg.com/news/2011-08-earth-bound-asteroids-stony.html[http://www.space.com/12733-earth-meteorites-stony-asteroid-mystery.html]?
>>?
>> Martin?
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Received on Fri 26 Aug 2011 12:48:29 PM PDT