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Astronomers Found A New Dwarf Planet, 2017 OF201, With The Longest Known Solar System Orbit —25k Yrs Long & Spanning 45–1,600 AU From The Sun. It’s 435 Miles Wide & Was Spotted In A 7-Year Blanco (Chile) & Hawaii Telescope Archived Images. Its Extreme Path May Be Shaped By Neptune Or The Milky Way, But It Doesn’t Support Planet 9 Theories.

Scientists discover new dwarf planet far beyond the orbit of Neptune: Meet 2017 OF201 | Live Science

https://www.livescience.com/space/planets/scientists-have-discovered-a-new-dwarf-planet-in-our-solar-system-far-beyond-the-orbit-of-neptune

Astronomers have announced the discovery of a new dwarf planet in our solar system, named 2017 OF201. Located far beyond Neptune, it orbits the sun every 25,000 years.