Earth-crosser asteroid

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Diagram showing different asteroid paths. The yellow band marks the Earth's orbit; the red line marks the asteroid's path.Outer-grazer(†): middle, bottomCrosser: right, bottom
Diagram showing different asteroid paths. The yellow band marks the Earth's orbit; the red line marks the asteroid's path.
Outer-grazer(†): middle, bottom
Crosser: right, bottom

An Earth-crosser asteroid is a Near-Earth asteroid whose orbit crosses that of Earth. The known numbered Earth-crossers are listed here. Those Earth-crossers whose semi-major axes are smaller than Earth's are Aten asteroids; the remaining ones are Apollo asteroids. See also the Amor asteroids.

The Earth-crosser asteroid group is a separate group from the Earth-crossing asteroid (ECA) group.

Of these asteroids, 3753 Cruithne is notable for having has an orbit that has the same period as Earth's.

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Small Solar System bodies
Lists: Minor planets · Asteroid groups and families · Binary asteroids · Asteroid moons
See also: Near-Earth object · Dwarf planet · Planet · Solar System · Pronunciation of asteroid names · Meanings of asteroid names.