Stars with a membership probability larger than 50%, parallax < 0.8 mas and 5 ≤ ϕ₁/deg ≤ 25, −3 ≤ ϕ₂/deg ≤ 3 are shown as black dots in (panel a) on the sky (ϕ₁, ϕ₂), in (b) in (ϕ₁, ) and in (panel c), (ϕ₁, μ_ϕ2). The RV-NC-stars are overplotted in blue, the RV-BC-stars in orange. Panel d: the radial velocities of the RV-NC-stars and RV-BC-stars, where the labels indicate the notation used for the JhelumX_Y stars. The measured uncertainties in position, PM and radial velocity for the RV-NC-stars and RV-BC-stars are plotted as errorbars, but are too small to be seen. The green curve in the top panel shows the median track (Eq. (1)) from Bonaca et al. (2019b).