Galactic plane-crossing locations for those objects whose origin is not constrained. The black rimmed, red and blue shaded areas mark regions where 68% and 95% (1σ and 2σ) of the 1.5 million Monte Carlo trajectories intersect the Galactic plane. Three black circles with different radii are overplotted for reference: a central circle (solid; 1 kpc), the solar radius (dashed; 8.3 kpc), and the Galactic disk (dashed; 20 kpc). To account for the finite lifetimes of the stars, only orbits that cross the Galactic plane within the upper 99% confidence limit for the respective stellar age are considered. The number in the lower right corner denotes this fraction of orbits and is displayed in red if the age restriction removes more than 20% of the Monte Carlo trials.