Overview

• S/2025 U1 is estimated to be about 10 kilometers across and follows a nearly circular path roughly 56,000 kilometers from Uranus.
• The faint satellite orbits in the planet’s equatorial plane between the inner moons Ophelia and Bianca, making it the 14th known inner moon.
• The detection comes from James Webb Space Telescope NIRCam observations, which were sensitive enough to spot what Voyager 2 missed in 1986.
• Researchers say the moon’s reflectivity is similar to other small Uranian satellites, consistent with why it eluded earlier surveys.
• Scientists note the find could clarify ring–moon dynamics and suggest more tiny moons may be awaiting discovery as follow‑up observations continue.