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X(4), X(262), X(316), X(511), X(671), X(842) 

K305 is the DrozFarny cubic DF(X511). It is a member of the class CL039. Its singular focus is X(381), the midpoint of GH. K305 meets the Steiner ellipse again at S1, S2 on the trilinear polar of X(290). The real asymptote is the line GX(511), intersecting the cubic at X(262). 
