Subaru Discovery of 2023 KQ14 Challenges Planet Nine Theory With 4th Stable Sednoid
Updated
Updated · SciTechDaily · Jun 14
Subaru Discovery of 2023 KQ14 Challenges Planet Nine Theory With 4th Stable Sednoid
1 articles · Updated · SciTechDaily · Jun 14
Summary
2023 KQ14, a sednoid discovered by the Subaru telescope in Hawaii, appears to follow a stable elliptical orbit, weakening the case that a large unseen planet is strongly perturbing distant Solar System bodies.
The object ranges from about 71 AU to 433 AU from the Sun, and its sednoid status means Neptune has little to no influence on its motion, making its stability especially problematic for Planet Nine models.
With 2023 KQ14 becoming the fourth known sednoid with a stable orbit, any hypothetical Planet Nine may need to lie beyond 500 AU rather than closer-in versions proposed to explain Kuiper Belt anomalies.
That pushes the search further out in a region too distant for direct spacecraft checks anytime soon—at New Horizons-like speeds, reaching such distances would take roughly 118 years—leaving telescopes as the main tool.