p = 1.3 (slider from 0 to 10, step 0.05)
e = 0.68 (slider from 0 to 2, step 0.02)
c = CurveCartesian((p * cos(t) / (1 - (e * cos(t)))), (p * sin(t) / (1 - (e * cos(t)))), t, 0, 6.28319)
O = Point(yAxis)
A, B, C, D, Intersection[axeX, c]_1 = Intersect(xAxis, c)
F: (x(D) + x(B), 0)