TGAS proper motion (left panel) and parallax (right panel) selection diagrams for NGC 6475, Ruprecht 147, NGC 7092, and ASCC 123. The proper motion and parallax criteria for membership selection is described in Sect. 3.1; the values for cluster proper motion and parallaxes in the diagrams are based on initial cluster membership. The final cluster proper motion and parallaxes are provided in Table 1. Left panel: the teal points represent the proper motion members, where all stars within the 2 mas yr⁻¹ radius (red circle) of the mean cluster proper motion are selected and the stars within 5 mas yr⁻¹ (blue circle) are only selected if their 3σ errors are consistent with the mean cluster proper motion. Right panel: the orange outline illustrates the stars with 3σ errors consistent with the mean cluster parallax; these stars are the TGAS astrometrically-selected candidates of the cluster.