F-type asteroid

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F-type asteroids are a relatively uncommon type of carbonaceous asteroid, falling into the wider C-group.

[edit] Characteristics

Generally similar to the B-type asteroids, but lacking the "water" absorption feature around 3μm indicative of hydrated minerals, and differing in the low wavelength part of the ultraviolet spectrum below 0.4μm.

The F-type and B-type asteroids are not distinguishable with the criteria used in the SMASS classification, so in that scheme are grouped together under the B-type.

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