I hadn't seen anything saying a year or two, I think I've only seen predictions on the orders of hours to days which would basically make it impossible to detec

I hadn't seen anything saying a year or two, I think I've only seen predictions on the orders of hours to days which would basically make it impossible to detect on anything that could be reasonably close to us since they'd be around for such a short time and only during/after the brightest part of the whole thing.