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X(4), X(69), X(376), X(1249), X(5485), X(6601) isogonal conjugate of X(3167) infinite points of the Thomson cubic. points of the Steiner ellipse on K170 points of (O) on pK(X6, Y) where Y = X(15305) is the reflection of X(3060) about X(4) 

K616 is a nodal cubic with node H we meet in the page K609. See a generalization and other related cubics in Table 43 where it is the cubic (K) obtained when P = X(376). The nodal tangents are parallel to the asymptotes of the Jerabek hyperbola and to the axes of the Steiner ellipse. The asymptotes of K616 are parallel to those of the Thomson cubic K002. The isogonal transform of K616 is K626. Construction Let S be a variable point on the circumcircle. The Steiner line (S) of S meets the line SX(376) at Q. When S traverses the circumcircle, the locus of Q is the nodal cubic K616. 
