CMD of comoving targets to KELT-20. 3D comoving stars are shown as blue circles, while non-3D PM targets are shown as white circles. KELT-20 (coral star) is highlighted, along with a solid line showing the best-fit PARSEC isochrone derived from the isochronal analysis, corresponding to the association’s median age. The dashed line shows a solar-age, solar-metallicity isochrone for comparison. Targets whose RVs differed by more than 3 km s⁻¹ and thus not included in our analysis are shown as an “x.” Shaded background panels denote spectral type color regions based on J.-V. Harre & R. Heller (2021).