ISBN: | 978-5-5138-6439-4 |
High Quality Content by WIKIPEDIA articles! An Earth-crosser is a near-Earth asteroid whose orbit crosses that of Earth as observed from the ecliptic pole of Earth`s orbit. 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.