An Asteroid-Like Object (Or a Cometary Nucleus)is Seen to Be

Multiple Choice

An asteroid-like object (or a cometary nucleus) is seen to be orbiting the Sun in a circular path with a period of 120 years.What is its distance of closest approach to Earth (the separation distance when the object is at opposition) ? (Be careful with your answer; a diagram might be helpful.)

A) 1314.5 AU
B) 24.33 AU
C) 25.33 AU
D) 23.33 AU