This technique preferentially selects objects on Earth-like orbits
out of the Bottke NEO model butBrasser and Wiegert (2008)show
that objects do not remain long in these types of orbits. This is not a
problem except in the sense addressed above—that the Bottke NEO
model is provided on a relatively coarse grid—because the NEO
model already accounts for NEO ‘residence times’ on all types of
NEO orbits. However, since we assume a flat distribution of NEO
orbit elements within the (a,e,i) bin corresponding to Earth-like orbits it is likely that we generate fractionally more of the extremely
Earth-like orbits than exist in reality