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physical object > natural object > celestial body > natural satellite > Nereid
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Nereid comparison table
Subject is part of is a kind of is an instance of has radiu has orbital period has discovery date has definition has eccentricity has discoverer
natural satellite satellite    Body orbiting a planet. Since 1957 the term has also been applied to man-made (artificial) satellites; many astronomers make the distinction by calling natural satellites moons (and the Earth's natural satellite the Moon).  
NereidNeptune natural satellite150-250 kmabout 360 days direct1950The outer satellite of Neptune. It has the most eccentric orbit of any natural satellite.e = 0.76Kuiper

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