Asteroid spectral class; thought to have enstatite (MgSiO3) achondrite surfaces
Also known as E-class asteroid
2 identifiers linking E-type asteroid across the web's reference databases
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E-type (enstatite achondrite–type) asteroids are asteroids thought to have enstatite (MgSiO3) achondrite surfaces. They form a large proportion of asteroids inward of the asteroid belt known as Hungaria asteroids, but rapidly become very rare as the asteroid belt proper is entered. Some are quite far from the inner edge of the asteroid belt, such as 64 Angelina. They are thought to have originated from the highly reduced mantle of a differentiated asteroid.