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X(6), X(2086), X(2087), X(2088) X(6) acnodal point vertices of cevian triangles of X(1) and X(6), see figure below A', B', C' :feet of the antiorthic axis 

Consider a circumconic passing through a point F on the circumcircle and its isogonal conjugate F*. This conic is clearly the isogonal transform of the line FF*. When F traverses the circumcircle, the locus of its perspector is K215. If f denotes the transformation which associates to P the intersection of the trilinear polars of P and P* then K215 is the image of the circumcircle. 
