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For Neptune's current position and visibility, see the Planet Wheel

Neptune

Proper Name	Neptune
Sidereal Period	164.90 years
Mean Distance from the Sun	4,504.5 million km 30.11 AU
Sidereal Day	18 hours, 12 minutes
Diameter	50,538 km
Mean Surface Temperature	-193°C
Moons	Despoina, Galatea, Larissa, Naiad, Nereid, Proteus, Thalassa, Triton; other small moons

Because Pluto pursues an eccentric orbit in comparison with the other worlds of the Solar System, Neptune is periodically the farthest planet from the Sun. This gas giant follows its course on the outer fringes of the Solar System.

The cold, blue world of Neptune, outermost of the gas giants.

With a diameter of 49,500km, Neptune is the smallest of the Jovian planets. In comparison to our own Earth, though, it is gigantic.

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