'The apoapsis of the ellipse.
The greatest distance between the focus and the contour.
Returns
apoapsis : number
See Also
periapsis : Returns shortest distance between foci and contour
Examples
>>> from sympy import Point, Ellipse
>>> p1 = Point(0, 0)
>>> e1 = Ellipse(p1, 3, 1)
>>> e1.apoapsis
2*sqrt(2) + 3'

@property
def apoapsis(self):

    return (self.major * (1 + self.eccentricity))
