Sky region around Stock 2. Grey dots show sources with G ≤ 16 mag within a radius of 240′ around the cluster nominal centre (magenta cross). Cluster members identified by Cantat-Gaudin et al. (2018) are represented by black points, and the cluster centre derived from them is shown by the white cross. Coloured circles and green triangles are the objects observed in this work (see Fig. 1) with the HARPS-N and CAOS spectrographs, respectively. The overdensities visible at RA ∼ 35° and Dec ∼ 57° correspond to the h & χ Per double cluster.