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 3 μm indicative of hydrated minerals, and differing in the low wavelength part of the ultraviolet spectrum below 0.4 μm.
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.
[edit] See also
