One of the so-called Kirkwood gaps in the asteroid belt
Chapter , Problem 25(choose chapter or problem)
One of the so-called Kirkwood gaps in the asteroid belt occurs at an orbital radius at which the period of the orbit is half that of Jupiters. The reason there is a gap for orbits of this radius is because of the periodic pulling (by Jupiter) that an asteroid experiences at the same location with every other orbit around the Sun. Repeated tugs from Jupiter of this kind would eventually change the orbit of such an asteroid. Therefore, all asteroids that would otherwise have orbited at this radius have presumably been cleared away from the area due to this resonance phenomenon. How far from the Sun is this particular 2:1 resonance Kirkwood gap?
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