Distribution of position closeness (dis_p) and velocity compactness (dis_v) for simulated compact population of stars with its confidence intervals (1σ, 2σ, 3σ) together with histograms and their Gaussian fits. Mean and standard deviation of the dis_p and dis_v distributions are shown as μ and σ, in mas and mas yr⁻¹, respectively. Dashed orange and blue lines indicate, respectively, the observed dis_p and dis_v for the co-moving group of stars.