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Most asteroids are located in the asteroid belt that lies between 2.1 and 3.3 AU from the Sun. What orbital periods correspond to the inside and outside of the asteroid belt?

What is the orbital period of one of the Trojan asteroids?

Icarus, an Apollo asteroid, has a perihelion distance of 0.19 AU and an aphelion distance of 1.97 AU. How often does it cross the orbit of the Earth?

An Oort cloud comet has an orbital period of 5 million years. What is its average distance from the Sun?

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