J − H vs. H − K diagram for all known members (KM) with magnitude uncertainties < 0.05 mag. The MS and the giant branch (Bessell & Brett 1988), as well as CTTS locus (Meyer et al. 1997), are indicated by a solid line. The theoretical tracks are corrected for extinction in JHKs (Cardelli et al. 1989), using the threshold A_V = 1 mag. The extinction vector is indicated with a red arrow. KM in full color belong to the populations (A, B, C, D, E, F, and G) found from the maximum-likelihood analysis.