Characteristics and composition
S-type asteroids have albedos varying from 0.10 to 0.22. They are composed primarily of iron and nickel with iron and magnesium silicates added. They resemble stony meteorites and ordinary rocks. They typically predominate in the inner regions of the asteroid belt.
Observation and exploration
S-type asteroids are somewhat brighter than the C-type and are thus easier to view.
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