99942 Apophis

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61	PDF Document Add to Reading List Source URL: lesia.obspm.fr Language: English - Date: 2011-11-21 13:39:11 Celestial mechanics Aten asteroids 99942 Apophis Planetary defense Near-Earth objects Asteroid 4 Vesta Orbit Comet Planetary science Astronomy Space
62	PDF Document Add to Reading List Source URL: arxiv.org Language: English - Date: 2005-09-20 20:18:58 Celestial mechanics Planetary defense Gravity tractor Asteroids Spaceflight Astrodynamics 99942 Apophis Asteroid NEAR Shoemaker Planetary science Astronomy Space
63	PDF Document Add to Reading List Source URL: elib.dlr.de Language: English - Date: 2011-06-09 04:25:37 Planetary defense Asteroid-impact avoidance Asteroids Earth 99942 Apophis Don Quijote Gravity tractor Lander Space exploration Spaceflight Space Astronomy
64	PDF Document Add to Reading List Source URL: planetary.s3.amazonaws.com Language: English - Date: 2008-02-25 18:50:54 99942 Apophis European Space Agency Asteroids Houyi Don Quijote Asteroid-impact avoidance Fobos-Grunt CubeSat Asteroid Spaceflight Space Planetary defense