Encyclopedia

HED meteorites

HED meteorites

A group of stony (achondrite) meteorites, named after the three types: howardites, eucrites, and diogenites. They are igneous rocks that are about 4.5 billion years old.
Collins Dictionary of Astronomy © Market House Books Ltd, 2006
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References in periodicals archive
HED meteorites were first connected with Vesta in the 1970s, when scientists noted their infrared and visible spectra were similar to the asteroid's.
The image above shows three slices of HED meteorites as viewed through a polarizing microscope.
Vesta at Its Best: Asteroid 4 Vesta is closest this month, a lustrous light in the southern sky
Evidence for dark material is also found in the HED meteorites that come from Vesta.
"Our analysis of the dark material on Vesta and comparisons with laboratory studies of HED meteorites for the first time proves directly that these meteorites are fragments from Vesta," Le Corre added.
New images show giant impacts stained Vesta with Carbon-rich material
In the case of Vesta, thanks to the HED meteorites, we have the samples first, and must try to relate them to our emerging geologic picture of Vesta from the Dawn mission," added Williams.
Complexities of ancient asteroidal world revealed
This crater may be the source of the HED meteorites and a population of smaller nearby inner-main-belt asteroids with similar spectra that are often referred to as Vestoids.
Dawn's early light: a Vesta fiesta! NASA's Dawn mission is giving scientists their first close-up look at a giant asteroid
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