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K198 is an isotomic equilateral nK. Its root is X(76), the isotomic conjugate of K. It is a member of the class CL005 of cubics. The triangle formed by the asymptotes is centered at X(381) midpoint of GH and its inradius is R. K198 contains the following points :
Floor van Lamoen has found a geometric characterization of K198 he describes in Hyacinthos, message #10825. The isogonal transform of K198 is K409. 
