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2002, Edward C. Blair, Asteroids: Overview, Abstracts, and Bibliography, Nova Publishers, →ISBN, page 15:
Dr. Witt suspected a highly eccentric orbit, enabling this asteroid to travel outside the main belt. He found that the majority of the asteroid's orbit was within that of Mars and named it Eros.
2008, O. Richard Norton, Lawrence Chitwood, Field Guide to Meteors and Meteorites, Springer Science & Business Media, →ISBN, page 28:
Such collisions may be the mechanism that sends fragments across the asteroid belt toward Earth and the terrestrial planets. If they survive passage through the main belt they may eventually establish elliptical orbits among the inner planets.
asteroid belt on Wikipedia.Wikipedia 