Here's what Vlemmings and his colleague say they found:
A large rocky something they call "Gna" (for a fast-moving Nordic messenger goddess, one of the authors told Scientific American), that could be an asteroid-type object roughly the size of Ireland zooming around somewhere near Uranus. Alternatively, the researchers propose, it could be an undiscovered planet floating much farther out, or even a brown-dwarf (bigger than a planet, smaller than a star) passing through interstellar space.
Also, a mysterious, unnamed object that appears in the sky close to the Alpha Centauri system that may be a "Super-Earth" planet far beyond even Pluto or a super-cool brown dwarf that's really far. It could also conceivably be an icy "trans Neptunian object," of which there are plenty in the frozen darkness past the eighth planet, but the researchers say that's less likely (it's also, not coincidentally, less interesting).
You don’t want anything zooming around Uranus.
Sorry ...