Gaia EDR3 colour−magnitude diagram (within 100 pc) showing the clusters from the k-means analysis from Fig. 9, using the same colour coding for the three clusters. Gaiamagnitudes for stars brighter than G = 3^m (e.g. the Sun) were estimated from V and I_C magnitudes according to Riello et al. (2021). The nearly equal mass M-dwarf binaries YY Gem and AU Mic lie above the main sequence due to their binary nature. In the case of AU Mic, its youth also plays a role. The third star AT Mic is a PMS object, and this triple is a member of the β Pic moving group.