Meet “Ammonite” – Fossil World at Solar System’s Edge Challenges Planet Nine Theory
Ammonite is the informal name for the trans-Neptunian object 2023 KQ14, discovered by the FOSSIL survey with Subaru’s 8.2-meter telescope in early 2023. Follow-up observations in July 2024 with the Canada–France–Hawaii Telescope and archival data from 2005 extended its observational arc to 19 years.