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The exact size of 2015 RR245 is not yet known, but the researchers think it's about 435 miles (700 kilometers) wide. Pluto is the largest resident of the Kuiper Belt, with a diameter of 1,474 miles (2,371 km).
originally posted by: Phage
originally posted by: wildespace
Somehow I get a feeling we're not going to get a serious discussion out of this.
The OP pretty much covered the serious part.