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A satellite of Neptune, eighth from the planet at a distance of 5 513 400 km, orbital period 360.13 days; also known as Neptune II. Its orbit is one of the most elliptical of any satellite in the Solar System, with an eccentricity of 0.75, and is inclined at 6°.7 to Neptune's equator. Nereid's diameter is 340 km. It was discovered in 1949 by G. P. Kuiper.

Subjects: Astronomy and Astrophysics.

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