The three-dimensional Galactic orbits of ‘Oumuamua and the COL young stellar association integrated backward for 50 Myr. Positive x is in the direction toward the Galactic center. Positive y is in the Galactic rotation direction. Sample trajectories for ‘Oumuamua and for stellar members of COL identified by Gagné et al. (2018) are represented by the bundles of green and blue lines, respectively. The colored volumes mark the 1σ−3σ surfaces for both Oumuamua and COL at 25, 35, and 45 Myr. An interactive version of this figure can be found in the online version of the paper.
An interactive version of this figure is available in the online journal.