Evolution of near-Earth asteroids close to mean motion resonances

Near-infrared spectroscopy of 3:1 Kirkwood Gap asteroids III

“…and secular (e.g., m 6 , m 16 , etc.) resonances with Jupiter and/or Saturn (Ji and Liu, 2007;Tedesco et al, 2002;Bycova and Galushina, 2001;Farinella et al, 1993a;Morbidelli and Moons, 1995;Hadjidemetriou, 1993;Yoshikawa, 1990). Similarly, most near-Earth asteroids appear to have originated in the main belt and escaped through these same resonances assisted by the Yarkovsky effect.…”

“…Objects near the 3:1 Kirkwood Gap centered at 2.50 AU are subject to excited eccentricities (e) which ultimately remove asteroids/asteroid fragments from the resonance. Theoretical models indicate the majority of asteroidal material delivered to the inner Solar System, particularly to the Earth, originates from the 3:1 and m 6 resonances (Ji and Liu, 2007;Tedesco et al, 2002;Bycova and Galushina, 2001;Farinella et al, 1993a;Morbidelli and Moons, 1995;Hadjidemetriou, 1993;Yoshikawa, 1990). For the 3:1 Kirkwood Gap, asteroids and collisionally-ejected fragments with semi-major axes (a) in the 2.47-2.53 AU range undergo chaotic orbital evolution on short timescales (Wisdom, 1985).…”