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Last updated on April 17, 2014 at 12:58 EDT

Neptune’s Moon Naiad

Planet Naiad — A moon of Neptune, Naiad is named after the Naiads of Greek legend.

Naid was the last of the satellites discovered in 1989 by Voyager 2. 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 break up into a planetary ring or impact on Neptune’s surface.

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Discovery

Discovered by Voyager 2
Discovered in 1989

Orbital characteristics

Orbital radius: 48,200 km
Orbital period: 7 hours and 6 minutes (0.294396 days)
Orbital inclination: 4.74

Physical characteristics

Diameter: 58 km
Mass: Unknown

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NASA

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Neptune8217s Moon Naiad