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X(4), X(110), X(523), X(1113), X(1114), X(2574), X(2575) vertices U, V, W of the cevian triangle of X(648), the tripole of the Euler line common points of the circumconic with center K and the parallel at H to the line KN = X(6)X(5) X(2574), X(2575) : points at infinity of the Jerabek hyperbola 

We meet this cubic in the paper "Antiparallels and concurrent Euler lines" by Nikolaos Dergiades and Paul Yiu, Forum Geometricorum vol.4, pp. 120. The tangents at A, B, C are perpendicular to the Brocard line, those at U, V, W concur at X(25). K210 is also psK(X25, X648, X4) in PseudoPivotal Cubics and Poristic Triangles. 
