>>23760080
>>23760083
"Rendezvous with Rama is a 1973 science fiction novel by British writer Arthur C. Clarke. Set in the 2130s, the story involves a 50-by-20-kilometre (31-by-12-mile) cylindrical alien starship that enters the Solar System. The story is told from the point of view of a group of human explorers who intercept the ship in an attempt to unlock its mysteries. The novel won the Hugo, Locus, and Nebula awards upon its release, and is regarded as one of the cornerstones in Clarke's bibliography. The concept was later extended with several sequels, written by Clarke and Gentry Lee. "
https://en.wikipedia.org/wiki/Rendezvous_with_Rama
I read this book more than 40 years ago.
the object is 'found out' to not just be an asteroid.
It comes in, it loops back out, spoiler alert: nothing happens everyone in the story is baffled, no one knows who sent it or where it's going.