In Depth | Oumuamua – NASA Solar System Exploration

Discovery. The first known interstellar object to visit our solar system, 1I/2017 U1 ‘Oumuamua, was discovered Oct. 19, 2017 by the University of Hawaii’s Pan-STARRS1 telescope, funded by NASA’s Near-Earth Object Observations (NEOO) Program, which finds and tracks asteroids and comets in Earth’s neighborhood. While originally classified as a comet, observations revealed no signs of …

https://solarsystem.nasa.gov/asteroids-comets-and-meteors/comets/oumuamua/in-depth/