The Distribution of Q-types among NEOs

Details The Distribution of Q-types among NEOs The Distribution of Q-types among NEOs

Oct 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011epsc.conf..338d&link_type=abstract

EPSC-DPS Joint Meeting 2011, held 2-7 October 2011 in Nantes, France. http://meetings.copernicus.org/epsc-dps2011, p.338

Computer Science

Scientific paper

We present the orbital distributions of 40 spectral Qtype near-Earth asteroids. Their spectra are consistent with a young, fresh surface indicating they have recently (< 1My, [1]) been altered. Through these orbital distributions we seek to further constrain both how and when their surfaces are freshened. The relative scarcity of Q-types with semi-major axes just greater than 1 AU compared with Atens (a < 1 AU) leads us to investigate the orbital effects of a close planetary encounter. The existence of Q-types with large perihelia (q > 1.2 AU) leads us to consider additional freshening mechanisms to Earth encounters.

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