CMD – G vs. (G_BP–G_RP) – Berkeley 97 potential members brighter than 17 mag in G-band. Left: CMD – G vs. (G_BP–G_RP) – of Berkeley 97. Unlike how it is mentioned in the literature, the isochrones fitting of the CMD are of log(age[yr]) = 6.8–7.1 for extinction values between and A_V = 3.0–3.2 mag. For log(age[yr]) = 7.1, the isochrone represents hypothetical stars with masses of M = 1.8–16 M_⊙. One star with a color index value larger than G_BP–G_RP > 2.0 mag is unlikely a member. Right: Close-up of the same CMD on the left. The brightest stars are HD 240016 and HD 240015 consecutively. The runaway candidate is shown as a red point. A typical 0.02 mag photometric error for each target is assigned to represent the uncertainty in the theoretical isochrones. The errors along the y-axis are smaller than the labels.