Diagnostic plots for a silver (NGC 2632) cluster. (a) Spatial distribution in the Galactocentric plane. The observed cluster (black) and simulated (with Gaia-like noise) cluster (coral) members are shown with arrows indicating the cluster-centric velocities. The Galactic orbit is shown by the olive arrow. (b) Distribution in tangential Galactic co-ordinates. (c) Absolute CMD coloured according to distance along the orbit. The same colour scheme is used for the small plots in the corners of (a) & (b). (d) Variation in V_{r,galactocentric} with φ_{galactocentric}. (e) R – μ_T distribution. (f) R−μ_R distribution. The central 20 pc region is omitted in (d-f) plots, and the outlier-rejected regression and Spearman correlation test results are given in the legend. The rolling average is plotted as a fainter line in (d-f).