My Catalina Sky Survey teammate Greg Leonard was asteroid hunting in the constellation of Hydra with our Schmidt telescope on Mt. Bigelow, Arizona when a fast moving unknown point of light passed through a set of his images.
After Greg reported his observations to the Minor Planet Center for the next 10 days it was tracked by observatories in Arizona, Italy, Hawaii, Australia, and Argentina.  Citizen scientist H. A. Güler analyzed these data.  The Minor Planet Center published the discovery of the near Earth asteroid 2018 CN41. The discovery was deleted when the object turned out to be a Falcon Heavy Rocket Upper stage with a Tesla roadster attached.