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Neptune’s Moon Galatea

Planet Galatea — Galatea is the fourth known moon of Neptune, named after the the Nereid of Greek legend.

It was discovered in 1989 by Voyager 2 and very little is known about it. 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: 62,000 km
Orbital period: 0.428745 days
Orbital inclination: 0.05

Physical characteristics

Diameter: 158 km
Mass: Unknown

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NASA

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Neptune8217s Moon Galatea


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