[meteorite-list] 25143 Itokawa and meteorites

[MexicoDoug]

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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