The nu(6) secular resonance region near 2 AU - A possible source of meteorites

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Asteroids, Astronomical Models, Celestial Mechanics, Meteorites, Orbital Resonances (Celestial Mechanics), Eccentricity, Jupiter (Planet), Resonance

Scientific paper

The nu(6) secular resonance region near 2 AU is characterized presently as a region to deliver meteorites on timescales of one million yr. A body which is injected from the nearby Flora region at a low eccentricity near the nu(6) region pumps up its eccentricity due to the proximity to the nu(6) resonance. As soon as close encounters with Mars occur, the body's semimajor axis starts a random walk. Due to this random walk, the body might be trapped in the 4/1 mean motion resonance with Jupiter at 2.065 AU or in the nu(6) resonance region between 2.04 and 2.06 AU. The 4/1 resonance continues to pump up the eccentricity up to 0.5 (earth-crosser) on comparatively short time scales. Without being trapped in the 4/1 resonance and remaining in the nu(6) resonance, the time scale to become an earth-crosser is at least several 100,000 yr. Preliminary numerical integrations over one million yr in the sun-Mars-Jupiter-Saturn model support this conjecture.

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