[meteorite-list] Vesta, for sure? part 2

[MEM]

The wikipedia articles linked below fit very well with Richards question as well 
as the discussion of "dunite and olivine diogenites".  It also removes my caveat 
about ejected body in my last message by stating that a candidate 
"Diogenite-like asteroid" unrelated to Vesta has been identified which may be 
from a differentiated body no longer with us.

"1459 Magnya:  Orbits in the outer main belt, too far from Vesta to be 
genetically  related. May be the remains of a different ancient differentiated 
body  that was shattered long ago."

Another candidate for a dunite or olivine diogenite is:
2579 Spartacus — contains a significant portion of olivine, which may indicate 
origin deeper within Vesta than other V-types.
See list at:
<http://en.wikipedia.org/wiki/V-type_asteroid>
<http://en.wikipedia.org/wiki/4_Vesta>

2 Pallas is a large and most certainly differentiated body but lacks evidence of 
an excavation and its spectrum shows carbonaceous chondriteaffinities

Elton

----- Original Message ----
> From: Richard Montgomery <rickmont at earthlink.net>
> To: Meteorite-list List <meteorite-list at meteoritecentral.com>
> Sent: Thu, April 7, 2011 9:42:30 PM
> Subject: [meteorite-list] Vesta, for sure?
> 
> Hi List...this is a completely neophyte question, so please accept my ignorance  
>in things astronomic...and allow me to ask you experts:
> 
> I have always  wondered why Vesta is the parent-body-de-jur for our HEDs, when 
>so many unfound  asteroids are no doubt cruizing around out there. Hence my 
>question:  Have  any asteroids been "paired" yet, and if not, why Vesta alone 
>gets the credit; as  well, couldn't our HED cousins be cousins from a 
>yet-to-be-discovered asteroid  pairing?
> 
> As you true scientists of course recognize, I'm completely green  in this 
>area.  I guess it's my timeless query  (X-factors-we-need-to-consider) that has 
>me bewildered.  Has Vesta somehow  distinguished itself as the one-and-only 
>parent-body?
> 
> I do understand  reflection technology has identified our HED meteorites to be 
>from Vesta, but  why not an undiscovered twin?  Or many multiple twins?
> 
> With  deference to those of you already in the know,
> 
> Richard Montgomery