S/2003 J 2 is a small moon that orbits the planet Jupiter. It was discovered in 2003 and is part of a group of moons known as the Carme group, which are characterized by their irregular orbits and similar sizes. This moon is relatively tiny, with a diameter of about 2 kilometers. The moon's surface is likely composed of ice and rock, similar to other moons in the Carme group. S/2003 J 2 is one of many natural satellites that contribute to the complex system surrounding Jupiter, the largest planet in our solar system.