J-type asteroids are
asteroids with spectra similar to that of
diogenite
Diogenites are a group of the HED meteorite clan, a type of achondritic stony meteorites.
Origin and composition
Diogenites are currently believed to originate from deep within the crust of the asteroid 4 Vesta, and as such are part of the HED m ...
meteorites and so, presumably, to the deeper layers of the crust of
4 Vesta
Vesta ( minor-planet designation: 4 Vesta) is one of the largest objects in the asteroid belt, with a mean diameter of . It was discovered by the German astronomer Heinrich Wilhelm Matthias Olbers on 29 March 1807 and is named after Vesta, t ...
.
Their spectra are rather similar to that of the
V-type asteroid A V-type asteroid or Vestoid is an asteroid whose spectral type is that of 4 Vesta. Approximately 6% of main-belt asteroids are vestoids, with Vesta being by far the largest of them. They are relatively bright, and rather similar to the more common ...
s but have a particularly strong 1 μm absorption band.
Examples are
2442 Corbett,
3869 Norton,
4005 Dyagilev, and
4215 Kamo.
[R. P. Binzel and S. Xu ''Chips off of asteroid 4 Vesta: Evidence for the parent body of basaltic achondrite meteorites'', Science, Vol. 260, p. 186 (1993).]
See also
*
Asteroid spectral types
An asteroid spectral type is assigned to asteroids based on their emission spectrum, color, and sometimes albedo. These types are thought to correspond to an asteroid's surface composition. For small bodies that are not internally differentiated ...
References
Asteroid spectral classes
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