# Vera C. Rubin Observatory Identifies Potential Sixth Dwarf Planet New object 2026 ED138 discovered in the Kuiper Belt challenges solar system classification. - **Source:** [Latest from Live Science](https://www.livescience.com/feeds.xml) - **Published:** 2026-10-29 - **Topic:** [Business](https://brifing.si/c/business) - **Original article:** - **On Brifing:** https://brifing.si/s/a10eaa54-e86e-41df-85a6-83d7afb9940c ## Discovery of 2026 ED138 The Vera C. Rubin Observatory has identified a potential new dwarf planet, designated 2026 ED138, located in the far reaches of the solar system beyond Neptune. This object is among the largest and brightest ever detected in that region. If confirmed, it would become the sixth officially recognized dwarf planet by the IAU. ## Overcoming Galactic Camouflage The object orbits the sun at approximately 46 times the distance between Earth and the sun. Its 25-degree orbital tilt caused it to be hidden within the light of the Milky Way's bulge. Previous telescopes struggled to distinguish it from the millions of stars, but the Rubin Observatory's advanced camera successfully isolated its movement. ## Advanced Data Processing Algorithms Astrophysicist Matthew Holman and colleague Kevin Napier developed specialized software to process the massive data streams from the observatory. By comparing billions of observations, the team successfully tracked the object's movement. They further validated the discovery by analyzing archival images from the Dark Energy Camera at the Cerro Tololo Inter-American Observatory in Chile. ## Defining Dwarf Planet Criteria Dwarf planets are defined as bodies large enough to be rounded by their own gravity but too small to clear their orbits. While the IAU currently recognizes five, including Pluto and Ceres, many astronomers suggest there are more. ED138's estimated diameter ranges between 600 and 1,500 kilometers, placing it within the potential dwarf planet size. ## Comparison to Known Worlds Pluto remains the largest recognized dwarf planet with a diameter of 2,377 kilometers, while Ceres is the smallest at 958 kilometers. ED138's size, inferred from its brightness and distance, makes it a significant candidate. Future observations are required to confirm its density and precise shape to meet the formal criteria for dwarf planet status. ## The Kuiper Belt Frontier The Kuiper Belt, extending from 30 to 50 times the Earth-sun distance, contains thousands of icy bodies composed of methane, ammonia, and rock. These objects serve as frozen time capsules from the early solar system. Identifying new candidates helps researchers understand the formation and evolution of these distant, cold regions of our solar system. ## Observatory Mission Capabilities The Vera C. Rubin Observatory began its 10-year mission in July, scanning the entire southern sky every few nights. Its digital camera is designed to detect transient events and moving objects with unprecedented efficiency. This capability allows researchers to identify rare celestial bodies that were previously missed by surveys limited by static imaging technology. ## Future Scientific Implications The discovery of ED138 highlights the potential for finding more hidden worlds as the Rubin Observatory continues its decade-long survey. By repeatedly imaging the southern sky, the team expects to uncover additional objects that were previously obscured. This ongoing mission could significantly expand our knowledge of the solar system's outer reaches and dwarf planet population. ## Sources covering this story - https://www.livescience.com/space/planets/bright-object-beyond-pluto-may-be-the-solar-systems-sixth-dwarf-planet — --- _Summary written by Brifing from the original reporting. Copyright in the original article belongs to its publisher; read the full piece at the link above._