auxiliary circle वाक्य

This auxiliary circle is said to " parametrize " the circles of the decomposition, meaning there is a correspondence between them and points of B.
One can choose an auxiliary circle B ( the pink circle in the figure ) such that each of the infinitely many circles decomposing the torus passes through a point of B.
The eccentric anomaly, " E ", is observed by drawing a right triangle with one vertex at the center of the ellipse, having hypotenuse " a " ( equal to the " semi-major " axis of the ellipse ), and opposite side ( perpendicular to the " major " axis and touching the point " P2 " on the auxiliary circle of radius " a " ) that crosses through the point " P ".