Sao is a moon of Neptune.


  • Sao was discovered along with two other moons, Halimede and Laomedeia, by Matthew J. Holman on August 14, 2002.
  • It was the first moon of Neptune discovered by using a ground based telescope since 1949.
  • Sao is a very, very faint moon; 100 million times dimmer than what can be seen by the naked eye.
  • Sao was named after a Nereid in Greek mythology.
  • It wasn't spotted by Voyager 2 because its distance from Neptune and its dimness.

Neptunian Moons
Naiad Thalassa Despina Galatea Larissa S/ 2004 N1

Proteus Triton Nereid Halimede Sao Laomedeia Psamathe Neso