@esinterstellar: Nereid, or Neptune II, is the third-largest moon of Neptune. It has the most eccentric orbit of all known moons in the Solar System. It was the second moon of Neptune to be discovered, by Gerard Kuiper in 1949. Orbital period: 360 days Discovered: May 1, 1949 Radius: 170 km Discoverer: Gerard Kuiper Gravity: 0.071 m/s² Density: 1.5 g/cm³ Rotation period: 12 hours