Production of Retrograde NEAs

Details Production of Retrograde NEAs Production of Retrograde NEAs

Oct 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011epsc.conf..536g&link_type=abstract

EPSC-DPS Joint Meeting 2011, held 2-7 October 2011 in Nantes, France. http://meetings.copernicus.org/epsc-dps2011, p.536

Computer Science

Scientific paper

A new NEO orbital distribution model was computed (see Ngo et al., this meeting) in order to optimize a pointing strategy for Canada's space telescope NEOSSat (Near-Earth Object Surveillance Satellite), set to launch in early 2012. Analysis of our NEO model integrations uncovered the unexpected production of retrograde orbits from main-belt asteroid sources. This population of retrograde NEAs makes up only 0.1% of the total steady-state NEA population (q < 1.3 AU). These objects typically flip to a retrograde state while in the 3:1 mean motion resonance with Jupiter and then live in this retrograde state for about 0.001 to 100 Myr. Given our integration and the estimated total NEA population, the existence of roughly a few retrograde 1 km NEAs is expected, in line with the recent identification of two such objects.

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