The Spin Rates of Small Near-Earth Asteroids

Details The Spin Rates of Small Near-Earth Asteroids The Spin Rates of Small Near-Earth Asteroids

Oct 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011epsc.conf.1680s&link_type=abstract

EPSC-DPS Joint Meeting 2011, held 2-7 October 2011 in Nantes, France. http://meetings.copernicus.org/epsc-dps2011, p.1680

Computer Science

Scientific paper

Rotation periods or lower limits have been obtained for a sample of > 80 small Near-Earth Asteroids (NEAs) with nominal diameters smaller than 800 m, using the 2.4 meter Hiltner telescope at the MDM Observatory. The observational strategy is designed to be particularly sensitive to periods between 2 minutes and 2 hours, which defines the "fast rotator" regime. The numbers of detected fast rotators are debiased (corrected for incompleteness) using simulated lightcurves forGaussian randomspheres. The results show a sharp drop in the fraction of fast rotators at a nominal diameter of 150 m (absolute magnitude H > 21.6), and do not indicate a smooth increase in the maximum spin rate with decreasing size.

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