Discovery: Sao was discovered on August 14, 2002, by a team of astronomers led by Matthew J. Holman, John J. Kavelaars, and Dan Milisavljevic.

Classification: Sao is classified as one of Neptune's irregular moons due to its distant and eccentric orbit.

Orbit: Sao orbits Neptune at a significant distance and has an eccentric orbit, meaning its path around Neptune is elongated and not perfectly circular.

Size: The estimated diameter of Sao is approximately 44 kilometers (27 miles). However, this is an estimate, and further observations and measurements may be required to determine its size more accurately.

Composition: The precise composition of Sao is unknown, but like other moons in the outer solar system, it is likely composed of a mixture of rock and ice.

Orbital period: 2,913 days or 7.97 years.

Radius: 13.67 mi

Discovered: August 14, 2002

Gravity: 0.012 m/s²

Density: 1.5 g/cm³