Maybe it's just a probe like our voyager 2 probe which travels at around 16 km/s. Could have travelled through the milky way for millions of years and just happens to randomly cross our solar system. Whatever civilization made that thing is probably long gone by now. I mean at least that would be a possibility.
Anyway, it's never Aliens until you can safely sort out any other possible explanation. So for the moment I will assume that this thing has a natural origin.
The thing is, even if it's of alien origin it is completely irrelevant. It's definitely not here for us and we have no way to communicate with it, so for us it might as well just be a random rock floating through space. Zero implications for any of our understandings.
Some scientists should stop being romantic with aliens.
Ehhh.. We are used to discuss about things A LOT more irrelevant around here.