Cep-Her candidate members in galactic l sky coordinates, plotted against RVs from new observations and the literature. The result shows two distinct radial velocity sequences. The black lines represent the manual cuts used to separate Cep-Her Main (red) from Cep-Her North (blue) and the field (lighter shades of red and blue). Probable field stars are assigned to one of the two Cep-Her subregions according to their position in 5D space–transverse velocity coordinates for reassessment in the final RV selections (see Figure 3) and for use in assessments of contamination (Section 3.2.2). The histogram at the right shows the distribution of RVs for stars with l > 70, showing the bimodal distribution of RVs over this range in l where both RV sequences are present.