Overview

• The new satellite carries the provisional designation S/2025 U1 and is estimated to be about 10 kilometers in diameter.
• It orbits roughly 56,000 kilometers from Uranus between Ophelia and Bianca on an almost circular, equatorial path.
• A Southwest Research Institute–led team detected the object on February 2, 2025, in ten 40‑minute JWST NIRCam exposures and confirmed its orbital motion.
• Voyager 2 and earlier telescopes did not see the moon, likely because of its small size and faint brightness.
• The find is the 14th known member of Uranus’s inner small‑moon group and awaits an official name from the International Astronomical Union, with scientists expecting more such moons to be found.