Table of Contents | Enchanted Learning All About Astronomy |
Site Index |
Our Solar System | Stars | Glossary | Printables, Worksheets, and Activities | ||||||
The Sun | The Planets | The Moon | Asteroids | Kuiper Belt | Comets | Meteors | Astronomers |
ASTEROIDS |
Introduction | Near-Earth Asteroids (NEA) |
Asteroids and Dinosaurs | List of Some Asteroids | Composition | Activities, Web Links |
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Composition of Asteroids |
Type | Composition | Percentage of Asteroids | Albedo (reflectivity) |
---|---|---|---|
Carbon (C-type) | Carbon | over 75 percent | 0.03-0.09 (Very dark) |
Silicate (S-type) | Metallic iron mixed with iron-silicates and magnesium-silicates | 17 percent | 0.10 -0.22 (Relatively bright) |
Metallic (M-type) | Iron/ nickel | less than 7 percent | 0.10-0.18 (Relatively bright) |
Dark (D-type) | Water ice/frozen carbon monoxide mixed with rock | less than 1 percent | 0.05 (Relatively dark and reddish) |
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