A simulated view of Naiad orbiting Neptune with The Sun in the distance.

A moon of Neptune, Naiad (nye'-ad [UK, US] or nay'-ad [US]; Greek plural Ναϊάδ-ες) is named after the Naiads of Greek legend. Image File history File links Download high resolution version (1152x845, 25 KB)A simulated view of Naiad orbiting Neptune with The Sun in the distance. ... Image File history File links Download high resolution version (1152x845, 25 KB)A simulated view of Naiad orbiting Neptune with The Sun in the distance. ... A computer simulation or a computer model is a computer program which attempts to simulate an abstract model of a particular system. ... Atmospheric characteristics Surface pressure ≫100 MPa Hydrogen - H2 80% ±3. ... The Sun is the star at the centre of our Solar system. ... Moons of solar system scaled to Earths Moon The common noun moon (not capitalized) is used to mean any natural satellite of the other planets. ... Atmospheric characteristics Surface pressure ≫100 MPa Hydrogen - H2 80% ±3. ... Naiad by John William Waterhouse, 1893 In Greek mythology, the Naiads (from the Greek νάειν, to flow, and νἃμα, running water) were a type of nymph who presided over fountains, wells, springs, streams, and brooks, as river gods embodied rivers, and some very ancient spirits inhabited the still waters of... Greek mythology comprises the collected narratives of Greek gods, goddesses, heroes, and heroines, originally created and spread within an oral-poetic tradition. ...

Naiad was discovered sometime before mid-September, 1989 from the images taken by the Voyager 2 probe. The last moon to be discovered during the flyby, it was designated S/1989 N 6. It is also designated Neptune III. Jump to: navigation, search 1989 is a common year starting on Sunday of the Gregorian calendar. ... The Voyager 2 spacecraft was launched in 1977. ... Unmanned space missions are those using remote-controlled spacecraft. ...

The discovery was announced (IAUC 4867) on September 29, 1989, but the text only talks of "25 frames taken over 11 days", giving a discovery date of sometime before September 18. September 29 is the 272nd day of the year (273rd in leap years). ... Jump to: navigation, search 1989 is a common year starting on Sunday of the Gregorian calendar. ... September 18 is the 261st day of the year (262nd in leap years). ...

It is irregularly shaped and shows no sign of any geological modification. Since its orbit is below Neptune's synchronous orbit radius it is slowly decaying due to tidal forces and will one day impact on Neptune's surface, or will break up into a planetary ring due to tidal forces (once inside its Roche limit). The tidal force is a secondary effect of the force of gravity and is responsible for the tides. ... A planetary ring is a ring of dust and other small particles orbiting around a planet in a flat disc-shaped region. ... The tidal force is a secondary effect of the force of gravity and is responsible for the tides. ... The Roche limit is the distance within which a celestial body held together only by its own gravity will disintegrate due to a second celestial bodys tidal forces exceeding the first bodys gravitational self-attraction. ...

• Orbital radius: 48,227 km
• Diameter: 96×60×52 km
• Mass: 1.9×10¹⁷ kg
• Estimated density: 1.2 g/cm³
• Orbital period: 0.294 d (7 h 6 min)
• Orbital inclination: 4.755° (to Neptune's equator), 4.746° (to the local Laplace plane), 33.15° (to the ecliptic)

The Laplace plane is defined as the mean plane occupied by the orbit of a satellite during a precession cycle. ... The plane of the ecliptic is well seen in this picture from the 1994 lunar prospecting Clementine spacecraft. ...