The comet has a hyperbolic orbit, but that doesn't mean it came from outside of the solar system. Most comets come from the Oort Cloud, where they orbit around

The comet has a hyperbolic orbit, but that doesn't mean it came from outside of the solar system. Most comets come from the Oort Cloud, where they orbit around the sun at great distance until their orbits are perturbed. It's postulated that the sun's path through the galactic plane is the source of these perturbations, but not the source of comets.