Other
Scientific paper
Oct 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011epsc.conf..429h&link_type=abstract
EPSC-DPS Joint Meeting 2011, held 2-7 October 2011 in Nantes, France. http://meetings.copernicus.org/epsc-dps2011, p.429
Other
Scientific paper
More than 300 asteroid shape models were derived by the lightcurve inversion method so far. These models represent the biggest sample of spin-vector parameters of asteroids determined by a single method. We present a simple statistical analysis of spin vectors for these asteroid models. We look for possible correlations between various physical parameters with an emphasis on the spin vector. In order to explain the observed spin-axis distribution, we investigate the bias of the lightcurve inversion method and present a simple theoretical model for the long-term evolution of spins. From this analysis, we find that the latitude distribution of small asteroids (D < 30 km) is clustered towards ecliptic poles and can be explained by the YORP thermal effect. On the other hand, the latitude distribution of larger asteroids (D > 60 km) exhibits an evident excess of prograde rotators, probably of primordial origin. The distribution of ecliptic longitudes seems to be isotropic.
Benishek Validimir
Brinsfield James W.
Brož Miroslav
Buchheim Robert K.
Durech Josef
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