Discovery of an asteroid and quasi-satellite in an Earth-like horseshoe orbit

Details Discovery of an asteroid and quasi-satellite in an Earth-like horseshoe orbit Discovery of an asteroid and quasi-satellite in an Earth-like horseshoe orbit

Oct 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002m%26ps...37.1435c&link_type=abstract

Meteoritics & Planetary Science, vol. 37, no. 10, pp. 1435-1441 (2002)

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Scientific paper

The newly discovered asteroid 2002 AA29 moves in a very Earth-like orbit that relative to Earth has a unique horseshoe shape and allows transitions to a quasi-satellite state. This is the first body known to be in a simple heliocentric horseshoe orbit, moving along its parent planet's orbit. It is similarly also the first true co-orbital object of Earth, since other asteroids in 1:1 resonance with Earth have orbits very dissimilar from that of our planet. When a quasi-satellite, it remains within 0.2 AU of the Earth for several decades. 2002 AA29 is the first asteroid known to exhibit this behavior. 2002 AA29 introduces an important new class of objects offering potential targets for space missions and clues to asteroid orbit transfer evolution.

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