Gravitational keyhole

From Wikipedia, the free encyclopedia

This article does not cite any references or sources. (November 2007) Please help improve this article by adding citations to reliable sources. Unverifiable material may be challenged and removed.

A gravitational keyhole, or resonance keyhole, is a small region of space that if an asteroid were to pass through it, its course would be altered due to Earth's gravity in a way that could cause such an asteroid to collide with the Earth on its next orbital pass.

See Also: 99942 Apophis