Oumuamua is the first interstellar object to pass through the Solar System. It was discovered on a highly eccentric hyperbolic trajectory on 19 October 2017, 40 days after turning around the Sun. The first observations were made by the Pan-STARRS telescope when the object was 0.2 AU from Earth, heading away from the Sun. It is the first of a new class of interstellar objects. As a result of its strongly hyperbolic trajectory, it will pass Neptune's orbit in 2022 and leave the Oort cloud in roughly 20,000 years. The amount of time the object has been drifting among the stars in the galactic disc is unknown.
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