Hipparcos absolute color–magnitude diagram in MIC vs. (V − I)J. The black squares correspond to the full catalog (statistically biased). The red squares correspond to the subsample of stars closer than 50 pc; this subsample is statistically unbiased only for absolute magnitude MV< 4.0 (corresponding to MI< 3.1, above the horizontal line in the diagram). The size scales are different between the red and black squares for readability.
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