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S-class asteroid
A moderately bright, slightly reddish type of asteroid believed to be composed largely of silicate minerals (the "S" stands for "silicaceous") such as olivine and pyroxene. S-class asteroids are quite in the inner part of the main asteroid belt, their proportion decreasing at greater distances from the Sun. They have an albedo of 0.10 to 0.28 and a reflectance spectrum that is flat at wavelengths longer than 0.7 micron. Examples include Eunomia (see Eunomia family) and the 219-km-diameter (29) Amphitrite. S-class asteroids may be the parent objects of stony-iron meteorites.
Related category
• ASTEROIDS AND OTHER MINOR PLANETS - TYPES AND GROUPS
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