The upper left panel is proper motion space. Blue circle indicates the radius and center of proper motions. Red dots in proper motion space are stars that are located inside the ellipse in l-b space and distance range.

The upper right panel is l-b space. Similar to the proper motion space, blue circle represents the radius and center of the spatial distribution. Green transparent ellipse shows fitted structure of the spatial distribution by GMM.

The lower left panel is distance distribution of stars that are in the circle in proper motion space and the ellipse in l-b space. Two vertical red dot lines are minimum and maximum distances of cluster stars we considered.

Finally, the lower right panel is CMD of stars satisfying all conditions. Stellar extinction is calibrated for whole stars with Gaia data. Stars without Gaia extinction data were calibrated with average extinction value of other cluster member stars that have data. Blue line is the best fit isochrone line with PARSEC (http://stev.oapd.inaf.it/cgi-bin/cmd) set of Z=0.02 isochornes.