GaiaG_BP − G_RP vs. G CMD of the field around NGC 330. Black points highlight all targets that meet our NGC 330 selection criteria, and red points highlight RSGs selected from the cluster members. Black crosses mark the RSGs with spectroscopic data presented here. This figure highlights the distinction between the RSG populations and lower mass red giant stars as well as blue supergiants in the cluster. Three stars in the spectroscopic sample do not meet the Gaia selection criteria; see text for details.