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X(3), X(4), X(186), X(2574), X(2575)
anti-points, see Table 77
isogonal conjugates of the Ix-anticevian points, see Table 23
The Kosnita quartic Q064 is a circular inversible focal nodal quartic.
The singular focus is X(186), the inverse of H in the circumcircle.
The node is O with nodal tangents parallel to the asymptotes of the Jerabek hyperbola.
Q064 has two real asymptotes also parallel to the asymptotes of the Jerabek hyperbola and meeting the Euler line at X(2072).
Q064 meets the circumcircle at the same points as the Orthocubic K006. The tangents at these points concur at O.
The circle with diameter the two other points on the sideline BC is orthogonal to the polar circle. Similarly for CA and AB.