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The Meteorite Apprentice

Are HED Meteorites Really from Vesta?

Posted by Dustin Dickens on

Are HED Meteorites Really from Vesta?

Meteorites come in many different flavors. They are typically grouped together based on some common feature or parent body. One such group is known as the HED meteorites, an acronym derived from the names of the three types of achondrite meteorites that compose the group; the howardite, the eucrite, and the diogenite. This is a very well studied clan of meteorites. They are thought by most researchers to originate from the asteroid Vesta or the associated V-type asteroids known as the Vestoids. The connection between the HED meteorites and Vesta is largely based on remote spectral analysis. We don't have any "ground truth" sample of Vesta or the V-type asteroids. While the data for Vesta and the Vestoids being the parent asteroid(s) for the HED meteorites is very compelling, It's not without some unanswered questions that at least some researchers think places legitimate doubt on the current consensus of Vesta and the Vestoids being the parent body(s) for the HED meteorites.

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Differentiation: chondrites & achondrites

Posted by Dustin Dickens on

Differentiation: chondrites & achondrites

Keeping it simple, differentiation, also known as 'planetary differentiation' is the process of an asteroid getting so big that most of the metal distributed throughout its mass is pulled by gravity down to the center to form a 'core'. This leaves the lighter rocky material to float above the iron-nickel core and form a 'mantle'. This little bit of information is a keyhole that will allow those new to meteorites to glimpse just how intertwined planetary science and meteorites truly are.
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  • Tags: achondrites, achondritic, chondrites, chondritic, differentiation, meteorites, planetary differentiation, planetary science

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