D-class asteroid

astronomy

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June 25, 2026

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D-class asteroids are a taxonomic classification of asteroids characterized by their low albedo (reflectivity) and a very red spectral reflectance at wavelengths longer than 0.7 micrometres. Their spectral properties are similar to a type of carbonaceous chondrite meteorite known as the Tagish Lake meteorite.1

While D-class asteroids are not as common as C-class asteroids, they represent about 8 percent of the asteroid population. Their composition is not fully understood, but they may contain significant amounts of carbon polymers or organic-rich silicates.1

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asteroid
Composition
D-class asteroids have low albedos and show reflectance spectra similar to the spectrum exhibited by a relatively new type of carbonaceous chondrite, represented by the Tagish Lake meteorite, which fell in January 2000.
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D-class asteroids have low albedos and show reflectance spectra similar to the spectrum exhibited by a relatively new type of carbonaceous chondrite, represented by the Tagish Lake meteorite, which fell in January 2000.
Read More