Nonlinear Sciences – Chaotic Dynamics
Scientific paper
Oct 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011epsc.conf.1875s&link_type=abstract
EPSC-DPS Joint Meeting 2011, held 2-7 October 2011 in Nantes, France. http://meetings.copernicus.org/epsc-dps2011, p.1875
Nonlinear Sciences
Chaotic Dynamics
Scientific paper
We will report on our search for near-Earth asteroid (NEA) families using the method proposed by [1], that relies on finding associations based on the Southworth-Hawkins D-criterion [2], a measure of orbit similarity, and on finding 'strings' of objects and a significant fraction of 'pairs' within the association. The process of identification of a NEA family is difficult due to the chaotic dynamics of the whole NEA region which is responsible for the rapid diffusion of members of the family into the background and short dynamical lifetime of all objects present. Using 1000 realistic NEAmodels we determined the statistical significance of the candidate NEA families detected in the real NEA sample from the actual Minor Planet Center asteroid orbital database mpcorb.dat. The identification of an NEA family will provide constraints on the NEA population's collisional processes and their dynamical evolution and internal structure. Finding a real family in the population (NEA) could in addition put a constraint on the collision rate of NEAs with Earth and help us to better understand forces influencing our nearest space environment.
Abe Sumiyoshi
Granvik Mikael
Jedicke Robert
Schunova Eva
Wainscoat Richard
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