S-type asteroids

S-type asteroids

A common asteroid type found in the inner asteroid belt, having moderate albedos (0.1 to 0.2) and reddish spectra. Given their composition (metallic nickel-iron, combined with iron and magnesium silicates), they could be the parent bodies of the stony-iron meteorites. (433) Eros is a prime example of an S-type asteroid.
References in periodicals archive ?
S-type asteroids are of a stony composition, and Itokawa is often referred to as a "rubble pile" due to the boulders, rocks and dust all stuck together by gravity (and possibly van der Waals forces).
Most asteroid specialists suspect that S-type asteroids have undergone some kind of "space weathering," a catchall term applied to the various processes that might somehow transform the surfaces of ordinary chondrite asteroids into ones with S-type spectra.
Although its disk was not resolved, Masursky's reflectivity suggests that it may not be an S-type (stony) asteroid, as had been assumed based on its orbital association with the Eunomia family of S-type asteroids.
They found that the inner asteroid belt is dominated by S-type asteroids.
Spectroscopically, S-type asteroids bear some resemblance to the meteorite varieties called ordinary chondrites and stony-irons, both of which contain the silicate minerals pyroxene and olivine as well as iron.
Carlson, who heads the NIMS team, the object consists of roughly the same material as Ida itself, with a moderately reflective rocky composition common to S-type asteroids.