Find the Polar Coordinates of the Point(s) of Intersection of the Given

Find the polar coordinates of the point(s) of intersection of the given curves for 0 $$0 \leq \theta < 2 \pi$$
- $$\mathrm { r } = \frac { \mathrm { a } \left( 1 - \mathrm { e } ^ { 2 } \right) } { 1 + \mathrm { e } \cos \theta }$$ Given that the polar equation r models the orbits of the planets about the sun, estimate the closest approach of a planet for which a = 21 and e = 0.79 to the sun.

A) 8 astronomical units
B) 2 astronomical units
C) 4 astronomical units
D) 38 astronomical units