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New observations of Kuiper Belt object 2007 OR10 have found it to be the largest unnamed object in the solar system, 955 miles across and about two-thirds the diameter of Pluto.
It also appears to rotate slowly, with each day about 45 hours long.
These results are decidedly uncertain, so don’t put much money on them. Nonetheless, the data continues to suggest that there are a lot of objects out there beyond Pluto.