Let P be a point in the line joining the circumcenter O I and the cevian quotient N/O between the ninecenter N and O. Let Pa, Pb, Pc be the reflections of P on the sides. The radical center of the circle centered at A and going through Pa and its analogues is a point X in the Euler line (fig. 2). When P is the point O, X is its reflection on the orthocenter H (fig. 1)