X(2), X(6), X(182), X(996), X(1001), X(1344), X(1345), X(4846), X(5967), X(10002), X(14609)
isogonal conjugates of, X(1340), X(1341)
points at infinity of the Thomson cubic
vertices of the Grebe triangle
K281 is a nodal cubic with node K, the nodal tangents being parallel to the asymptotes of the circum-conic through G and K. It has three real asymptotes parallel to those of the Thomson cubic.
The tangents at the vertices of the Grebe triangle G1G2G3 concur at the intersection X(14968) of the lines X(2)X(32) and X(6)X(528). See also Table 57.
Locus properties :