[meteorite-list] 25143 Itokawa and meteorites

From: David R Childs <david.childs7_at_meteoritecentral.com>
Date: Fri, 26 Aug 2011 17:12:12 +0100
Message-ID: <1B79C4BB10A64D7FB5CB476B1D7E4614_at_user85620c2ece>

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 12:12:12 PM PDT