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Scientists Discover Potential Dwarf Planet, Dubbed 'Extreme Cousin' of Pluto

  • Scientists from the Institute for Advanced Study discovered a potential dwarf planet named 2017 OF201 with an extreme orbit around the Sun.
  • Over a span of seven years, researchers analyzed data collected through multiple exposures from telescopes including the Victor M. Blanco and Canada-France-Hawaii to successfully identify 2017 OF201.
  • The object orbits the Sun once every 25,000 years, has a farthest orbital distance exceeding 1,600 times that of Earth's orbit, and its size is believed to be roughly one-third that of Pluto's diameter.
  • Study author Sihao Cheng said its aphelion is 'more than 1,600 times that of the Earth's orbit' and suggested up to a hundred similar objects could exist but remain undetectable.
  • Scientists propose that interactions with a massive planet propelled 2017 OF201 into its distant, elongated orbit, and its detection hints at the existence of numerous other distant dwarf planets that remain undiscovered.
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Heise broke the news in Germany on Monday, May 26, 2025.
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