It will leave our solar system never to return. This can sometimes happen to a comet or asteroid that formed in our solar system. An asteroid can make a close approach to a large planet like Jupiter, giving it a boost of speed that sends it hurtling out of the solar system. The path of its orbit is almost perpendicular to the orbits of the planets, and it hasn't passed near any of the large planets in our solar system. So it must have been moving fast when it entered our solar system.

Source: Forbes October 26, 2017 22:07 UTC