UBC 1052 is a 2.25 Gyr old inner-disc open cluster at Z=340 pc with [Fe/H]=0.05 dex and unique abundance patterns among high-resolution studied clusters, consistent with inward migration.
Additionally, as a reference, we also plot Ruprecht 147 (NGC 6774, in grey), which has a similar age to UBC 1052 (2.5−3 Gyr; Curtis et al
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The high-altitude, inner-disc, and chemically peculiar open cluster UBC 1052
UBC 1052 is a 2.25 Gyr old inner-disc open cluster at Z=340 pc with [Fe/H]=0.05 dex and unique abundance patterns among high-resolution studied clusters, consistent with inward migration.