S-type asteroid


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S-type asteroid

[′es ¦tīp ′as·tə‚rȯid]
(astronomy)
A type of asteroid whose surface is reddish and of moderate albedo, containing pyroxene and olivine silicates, probably mixed with metallic iron, similar to stony iron meteorites.
References in periodicals archive ?
This sequence was followed immediately with images of the nearby S-type asteroid (755) Quintilla using the same sequence of filters, so that the relative intensity of the two objects could be directly compared.
Given the above observations, the task now was to derive the reflectance spectrum of the target object by comparing it with a known reflectance spectrum of an S-type asteroid.
In this paper, (27) Euterpe is used as an example of a typical S-type asteroid as shown in Figure 2 of Ref.
The shape of the resultant reflectance spectrum (see Figure 4) is strikingly different to that of an S-type asteroid.
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).