Location of the Trumpler 5 RRL (black star) with respect to the field population in the proper motions (top) and parallax versus pmRA (bottom) planes. Iso-contours represent the density of cluster members (orange), all field stars (gray) within the cluster’s tidal radius, and 2000 field RRL stars (violet) within in a FOV of 25° around the cluster. A similar result is found when using proper motion in declination (not shown). The analysis yields a final probability (0.049 ± 0.013)% that the RRL is a chance interloper.