[ReptileMan]

I am open minded, but Arthur Clarke solved it. If it was alien it would have slingshotted around the sun. Unless it is on collision course with a planet or using the sun to modify its course towards another star - you can assume that it is not alien and functioning.

[DennisP]

Fwiw, Avi's hypothesis for Oumuamua was not that it was functioning, but that it was old, defunct light sail.