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Meet ‘Ammonite’ — A New World Just Found In The Solar System

OUTER SOLAR SYSTEM, JUL 15 – 2020 VN40 orbits the Sun once for every ten Neptune orbits on a highly inclined path 140 times Earth's distance, revealing new dynamics of outer solar system evolution.

  • Astronomers using Japan's Subaru Telescope in Hawaii discovered a distant object named 2023 KQ14, nicknamed Ammonite, in 2023.
  • The discovery was supported by the FOSSIL survey and computational models indicating that Ammonite has remained in a consistent orbit for roughly 4.5 billion years, setting it apart from other known sednoids.
  • Ammonite is the fourth sednoid found, orbiting beyond Neptune in an unusual path that does not cluster with other sednoids, challenging some Planet Nine theories.
  • Dr. Yukun Huang noted in a press release that Ammonite's unique orbit does not align with other Sedna-like objects, which challenges the Planet Nine theory, while simulations indicate that if such a planet exists, it may orbit farther from the Sun than previously estimated.
  • This finding places new constraints on Planet Nine's orbit and supports ongoing debate about the Solar System's outer reaches, indicating future telescopes may reveal more about these distant bodies.
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Forbes broke the news in United States on Tuesday, July 15, 2025.
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