Hyades. (upper left) Spatial distribution of the members of the Hyades (black), the leading tidal arm (green), and the trailing tidal arm (red) from Jerabkova et al. (2021). The coordinates x_MW and y_MW refer to a non-rotating rest frame of the Milky Way with a shifted origin at which the position of the Sun lies (0, 0). The positive x-axis points towards the Galactic centre, and the positive y-axis points towards Galactic rotation. The arrow indicates the motion of the star cluster centre in the Galactic rest frame. Upper right: positions of cluster and tidal tidal members in polar coordinates calculated as described in Sect. 2. lower left: radial cumulative distribution of the number of stars in the leading and trailing tidal arm of the Hyades (lower right:) Radial cumulative evolution of the normalised asymmetry (Eq. (1)) considering tidal tail stars with a distance to the cluster centre smaller than or equal to r.