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What materials are found on C-class asteroids?
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Asteroid
This rock would take out more than just a T. rex.
C-class asteroids are characterized by low albedos and featureless spectra, which indicate the presence of light-absorbing materials on their surfaces. Their composition is similar to that of [carbonaceous chondritic meteorites], which are formed from carbonaceous precursor materials that have undergone metamorphism or hydrothermal alteration.12
Key details regarding their surface materials include:
- Hydrous Silicates: At least half of C-class asteroids exhibit spectral features associated with iron-bearing hydrous silicates. Some are specifically known to contain hydrated minerals.21
- Carbonaceous Material: These asteroids are considered candidate sources for carbonaceous chondrites. While the name of these meteorites can be a misnomer, they often contain organic matter and fine-grained matrices.23
- Compositional Links: Their spectral reflectances align with the constituent assemblages found in carbonaceous chondrites.1
While C-class asteroids are the most common type in the main asteroid belt, their surfaces are distinct from those of S-class asteroids, which are rich in olivine, pyroxene, and metallic iron.12