Naiad (moon)

Discovery and Naming

Naiad is a small moon that goes around the planet Neptune. It is called Neptune III and was found in 1989. It was given the temporary name S/1989 N 6. The moon is named after the naiads, water spirits from Greek legend.

Orbit

Naiad is the closest moon to Neptune. It orbits very near the planet, only about 48,224 kilometers from Neptune's center. Because it is so close, Naiad goes around Neptune faster than the planet turns. This makes Naiad's path get closer to Neptune over time.

Future of Naiad

Scientists think that in the future, Naiad might crash into Neptune's atmosphere or break apart and become a new ring around the planet. Its close position to Neptune makes it interesting to study, helping us learn more about the moons around this faraway world.

History

Naiad was found in September 1989 using pictures from the Voyager 2 probe. It was the last moon found during the space mission and was called S/1989 N 6. The discovery was announced on 29 September 1989. The moon was named Naiad on 16 September 1991.

Physical characteristics

Naiad has an irregular shape. Scientists think it is made of pieces that joined together again after being broken apart. This happened when Triton was captured by Neptune and its path around the planet became very uneven.

Orbit

Naiad moves around Neptune in a special way with another moon named Thalassa. Each time Naiad orbits Neptune, it passes above and below Thalassa twice. This pattern happens about every 21 and a half days on Earth. Even though the moons are close, this pattern helps keep their paths safe and separate.

Exploration

Since the Voyager 2 flyby, scientists have studied Neptune and its moons using telescopes on Earth and the Hubble Space Telescope. In 2002–03, the Keck telescope looked at Neptune and found the four largest inner moons, but Naiad was not seen then. Later, in October 2013, the SETI Institute found Naiad in old pictures from the Hubble Space Telescope taken in 2004. Naiad was found far from where it was expected, showing that earlier guesses about its position were wrong.