E-type asteroid

E-type asteroids are asteroids thought to have enstatite achondrite surfaces. They form a large proportion of asteroids inward of the main belt known as Hungaria asteroids,cite book |author=McSween, Harry Y. |authorlink= |editor= |others= |title=Meteorites and their parent planets |edition= |language= |publisher=Cambridge University Press |location=Cambridge, UK |year=1999 |origyear= |pages= p168|quote= |isbn=0-521-58751-4 |oclc= |doi= |url=http://books.google.com/books?id=BtNJoP5HlU8C&pg=PA168&dq=%22E-type+asteroid%22+%22Hungaria+asteroids%22&sig=ACfU3U2ixJC_ZfTRpQJuBOJb_M1XEZZ0QA |accessdate=] but rapidly become very rare as the main belt proper is entered. There are, however, some that are quite far from the inner edge of the main belt, such as 64 Angelina. They are thought to have originated from the highly reduced mantle of a differentiated asteroid.

They have a high albedo (0.3 or better), which distinguishes them from the more common M-type asteroids. Their spectrum is featureless flat to reddish. Probably because they originated from the edge of a larger parent body rather than a core, E-types are all small, with only three having diameters above 50 kilometres and no others above 25 kilometres. Aubrites are believed to come from E-type asteroids.Fact|date=September 2008

This grouping may be related to the Xe-type of the SMASS classification.

Notes

ee also

*Asteroid spectral types
*L-type asteroid
*S-type asteroid
*X-type asteroid
*2867 Šteins