What is kirkwood gap?

Kirkwood Gap

A Kirkwood gap is a gap or dip in the distribution of main-belt asteroids with semi-major axis (or equivalently their orbital period). They correspond to the location of orbital resonances with Jupiter.

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Some articles on kirkwood gap:

Hungaria Family
... lying somewhat inwards of the "core" of the asteroid belt that lies beyond the 41 Kirkwood gap ... perturbed to be forced into an extremely eccentric and unstable orbit, creating the innermost Kirkwood gap ... in low inclination orbits are, unlike those outside the 41 Kirkwood gap, strongly influenced by the gravitational field of Mars ...
Kirkwood Gap
... A Kirkwood gap is a gap or dip in the distribution of main-belt asteroids with semi-major axis (or equivalently their orbital period) ... The gaps were first noticed in 1857 by Daniel Kirkwood, who also correctly explained their origin in the orbital resonances with Jupiter while a professor at Jefferson College in Canonsburg, Pennsylvania ... of asteroids have been found to possess high eccentricity orbits which do lie within the Kirkwood gaps ...

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    The theatre is the best way of showing the gap between what is said and what is seen to be done, and that is why, ragged and gap-toothed as it is, it has still a far healthier potential than some poorer, abandoned arts.
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