>The object, for now, designated 2023 KQ14 and nicknamed “Ammonite,” was found by astronomers in Japan using its Subaru Telescope in Hawaii. Announced in a paper published today in Nature Astronomy, the object is not a planet but a sednoid. It's only the fourth sednoid ever discovered.

https://www.forbes.com/sites/jamiecartereurope/2025/07/15/meet-ammonite---a-new-world-just-found-in-the-solar-system/