Table 1: Summary of the dynamical properties of the bodies injected into the $\nu _{6}$, 3:1 and 5:2 powerful resonances studied by different authors. The median lifetimes ( Half-Life) of bodies initially in each of those resonances and the median times required to cross the orbit of the Earth ( $T_{\rm cr}$ Earth) have been derived by Gladman et al. (1997). Bottke et al. (2002) determined the median times spent in the NEA region ( $T_{\rm NEA}$) for bodies coming from the different resonant regions. On the other hand, the typical end states were analyzed by Gladman et al. (1997) who followed the orbital histories of more than one hundred particles injected into each resonance for up to $\sim $100 Myr. Finally, the mean collision probabilities with Earth ( $P_{\rm col}$ Earth), integrated over the lifetime in the Earth-crossing region, were derived by Morbidelli & Gladman (1998).
  $\nu _{6}$ 3:1 5:2
Time scales (Myr)
Half-Life 2.3 $\sim $2.4 $\sim $0.6
$T_{\rm cr}$ Earth 0.5 $\sim $1.2 $\sim $0.4
$T_{\rm NEA}$ 6.54 2.16 0.4
End states ($\%$)
Impact sun 79.1 $\sim $71.5 $\sim $7.1
Hyperbolic orbit 11.8 $\sim $27.4 $\sim $90.9
Survivors 1.8 0.7 0
Collision probability
$P_{\rm col}$ Earth $\sim $10-2 2 $\times$ 10-3 2.5 $\times$ 10-4

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