Overview

• NASA announced the finding on August 19 based on JWST observations taken on February 2, 2025.
• The satellite, provisionally designated S/2025 U1, increases the number of known Uranian moons to 29.
• It travels on an almost circular path between the moons Ophelia and Bianca near the inner edge of the rings.
• The team estimates a diameter of about 10 kilometers and an orbital period near 9.6 hours, faster than Uranus rotates.
• The discovery, led by Maryame El Moutamid at the Southwest Research Institute, awaits IAU recognition and naming and underscores JWST’s power to probe ring–moon dynamics.