Vector-point diagram of proper motions for region of Quintuplet cluster. The yellow and green ellipses show 1σ and 2σ distributions for a 2D Gaussian fit, respectively. The dashed line shows the Galactic plane orientation. Top and right panels: histogram distributions of v_x and v_y, as well as their Gaussian fits with μ and σ showing the mean and standard deviation of the distributions in mas yr⁻¹. The motion parallel to the Galactic plane (v_x) presents a tail of field sources, whereas the motion perpendicular to the plane (v_y) is dominated by velocity dispersion. Violet points show the stars with significant proper motions and the red points the non-significant ones.