According to Sam Deen, a citizen scientist, the size range means it is likely a large comet or small dwarf planet.
He wrote in a post on the Minor Planet Center: “[That] puts it on a similar scale, if not larger than, Sarabat’s huge comet C/1729 P1, and almost undoubtedly the largest Oort Cloud object ever discovered – almost in dwarf planet territory!”
What makes the object even more peculiar is the strange orbit.
According to analysis, the object travels close to the Sun and then swings back out to the Oort Cloud – the circumstellar disk of gas and dust which encircles the solar system.
READ MORE: NASA’s Hubble spots comet with 400,000mile long tail