K-type asteroids are relatively uncommon asteroids with a moderately reddish spectrum shortwards of 0.75 μm, and a slight bluish trend longwards of this.
Their spectrum resembles that of CV and CO meteorites.
These asteroids were described as "featureless" S-types in the Tholen classification.
The K-type was proposed by J. F. Bell and colleagues in 1988 for bodies having a particularly shallow 1 μm absorption feature, and lacking the 2 μm absorption.
These were found during studies of the Eos family of asteroids.