>>514011337 (OP)
I think it's a surveillance device cloaked as a comet. Ayy's probably know we are intelligent enough to figure out that the trajectory this thing is on is likely guided. They also know if it mimics a comet even slightly, our scientists will leave it at that.
My thinking is that these interstellar objects may be coming from an advanced species that is likely less advanced than the Gray's. Probably something like two or three thousand years ahead of us.
Our issue is probably that we have started being detected by lower grade intelligent species. Since we have been screaming that we exist since we had the ability to. Not sure if it's a good idea.