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Catalogued as 2017 OF201, the object belongs to the same all-star family as Pluto: dwarf planets. Its diameter, roughly 435 miles (700 km), is half Pluto’s, ...

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This is because 2017 OF201’s orbit does not follow the pattern exhibited by other known trans-Neptunian objects, which tend to cluster together.

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Mr Cheng said the discovery of 2017 OF201 has implications for hypotheses involving the potential existence of a ninth planet in our solar system, dubbed Planet X or Planet Nine.

The researchers said 2017 OF201 was identified in observations by telescopes in Chile and Hawaii spanning seven years. “It is potentially large enough to qualify as a dwarf planet.