Curves102 of 113
Ophiuride
Uhlhorn, 1809
Ophis is Greek for snake and oura for tail, and MathWorld says the curve is named for its likeness to a kind of starfish. Uhlhorn studied this circular cubic, which has a double point, in 1809. When a = 0 it is the cissoid of Diocles.
r = (b sin θ - a cos θ) tan θ
On mathcurve.com as Ophiuride