X(3), X(6), X(23), X(25), X(111), X(187), X(1177), X(2393), X(2930), X(3455), X(8428), X(10355), X(13493)
E = X(3455), X(32)-isoconjugate of X(23), isogonal conjugate of X(316)
isogonal conjugates of the anticomplements of X(67), X(111)
Ka, Kb, Kc : vertices of the tangential triangle, on the perpendicular bisectors
X(111)A /\ X(3)Ka, etc, also on the perpendicular bisectors
K108 is the only circular pK with pole X(32). Its pivot is X(23), the far-out point. The singular focus is X(14655).
The real asymptote is parallel to the line X(6)X(25).
Let A'B'C' be the tangential triangle i.e. the anticevian triangle of K. The three circles PAA', PBB', PCC' are concurrent if and only if P lies on K108 (together with the line at infinity). See also K008, property 4.
See the analogous K1129.