Abstract
In this paper, we have improved the Hyades members with aid of the Gaia EDR3 source. We have studied their kinematics, including computations of the convergent point with AD-diagram method such as
, their spatial velocities
, their morphology with 3D. A relation was established for Hyades stars between their Galactic coordinates
and the angular distances
from the vertex. The precision criteria of this relation are very satisfactory and a correlation coefficient of value
was found which proves that the attributes are completely related linearly.