HED meteorite

The HED meteorites are a grouping of achondrite meteorite types, the:HowarditesEucritesDiogenitesDuniteOlivine DiogenitesThese are all thought to have originated from the crust of the asteroid 4 Vesta, their differences being due to different geologic histories of the parent rock. Their crystallization ages have been determined to be between 4.43 and 4.55 billion years from radioisotope ratios.They are a relatively common type except for the dunite which is represented by only one meteorite, NWA 2968. The HED meteorites account for about 5% of all finds, which is about 60% of all achondrites.
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