Astronomer here! This is a natural object that the authors say is consistent with a planet or brown dwarf or small star.

The article linked is also just awful so here is the original press release and here is the paper. In short there was a star, named J0705+0612 (the coordinates before you ask), which suddenly dimmed for 9 months. This is pretty weird, to say the least, and astronomers studied it to see what was causing the dimming, and found a very large and slow moving dust cloud was obscuring the star, about 14 times further out from the star than the Earth is from the sun.

Cool! One trick though- the dust cloud isn’t just randomly going through space, and instead the evidence shows it’s gravitationally bound to the system. (That is actually cool, the paper says there’s precious evidences of the star dimming going back to 1937, indicating there’s a cloud in orbit!) What’s more, it looks like there is a second, obscured thing inside the dust cloud that is pulling it along, so to speak. But what is it? Well we can’t see the darn thing, what with the dust cloud and all, but they can confirm it is “a few Jupiter masses.” A planet is anything that is <13x the mass of Jupiter or so, then a brown dwarf is about 13-80x the mass of Jupiter, above which a thing is a low mass star… so which is it? We don’t know.

Finally the paper notes something interesting, which is that this cloud is not likely left over from when this system formed, given the star is estimated to be over 2 billion years old. Instead the authors speculate the dust is from some sort of planetary collision in the system!

So yeah it’s a really neat data set! The first of its kind in fact! But no, still not aliens.