“Buffy” is the informal name of 2004XR190, a new rock (with “a diameter of between 500 and 1000 kilometres, making it somewhere between a fifth and nearly half as wide as Pluto”) buzzing around in a circular but highly inclined (47°) orbit beyond Pluto (just under 60A, but it comes in as close as 50AU).
The circular-but-inclined orbit is already giving the theorists conniptions, but I wonder if it will have moons?
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