Astronomers have announced the discovery of 2026 ED138, a potential new dwarf planet located beyond Pluto, using data from the Vera C. Rubin Observatory.
The candidate was presented at the 59th Annual Division for Planetary Sciences meeting in Spokane, Washington. Researchers at the Center for Astrophysics | Harvard and Smithsonian identified the object despite its position against the crowded star fields of the Milky Way.
Initial estimates suggest 2026 ED138 measures between 600 and 1,500 kilometres in diameter and orbits approximately 46 astronomical units from the Sun.
The Rubin Observatory is scheduled to survey the southern sky for 10 years. Scientists expect its extensive observations to help uncover distant solar system objects that earlier surveys may have missed.
Related Tweet:
The Vera Rubin Observatory discovered a suspected dwarf planet beyond Neptune. If confirmed, it would be the sixth known dwarf planet in our solar system. https://t.co/nSDz6hflYa
— SPACE.com (@SPACEdotcom) October 28, 2026
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