Overview

• The object, provisionally designated S/2025 U1, was detected in James Webb images captured in February.
• It follows an almost circular orbit about 56,000 kilometers from Uranus within the planet’s inner satellite region.
• Estimated at roughly 10 kilometers across, it is the fourteenth and smallest of Uranus’s inner moons.
• Its diminutive size and faintness explain why it escaped past observations, including Voyager 2’s 1986 flyby.
• NASA, the European Space Agency and the Canadian Space Agency publicized the detection through the Webb mission team.