S/2018 J 3

S/2018 J 3 is a small outer natural satellite of Jupiter discovered by Scott S. Sheppard on 12 May 2018, using the 6.5-meter Magellan-Baade Telescope at Las Campanas Observatory, Chile. It was announced by the Minor Planet Center on 19 January 2023, after observations were collected over a long enough time span to confirm the satellite's orbit.
S/2018 J 3 is part of the Carme group, a tight cluster of retrograde irregular moons of Jupiter that follow similar orbits to Carme at semi-major axes between, orbital eccentricities between 0.2–0.3, and inclinations between 163–166°. It has a diameter of about for an absolute magnitude of 17.3, making it one of Jupiter's smallest known moons.