  We investigate the properties of K0V stars with Hipparcos parallaxes and
spectral types taken from the Michigan Spectral Survey. The sample of 200
objects allows the empirical investigation of the magnitude selection
(Malmquist) bias, which appears clearly present. By selecting those objects
that are not affected by bias, we find a mean absolute magnitude of Mv~5.7, a
downward revision from 5.9 mag. listed in Schmidt-Kaler (1982). Some objects
have absolute magnitudes far brighter than Mv~5.7, and it is suggested that
these objects (~20% of the total sample) are K0IV stars which may have been
mis-classified as a K0V star. The presence of the Malmquist bias in even this
high quality sample suggests that no sample can be expected to be bias-free.
