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Neptune

[Image of Neptune]

Radius:
24,622 km

Mass:
1.02x1026 kg

Orbital Period:
164.79 Earth years

Rotation Period:
0.67 Earth day

Distance from Sun:
4,497.07 million km

Satellites:
Triton, and smaller moons Naiad, Thalassa, Despina, Galatea, Larissa, Proteus, and Nereid.

Neptune is the ninth planet from the Sun (counting dwarf planets). It has one prominent moon, Triton, and a number of smaller moons.

Web Pages with Information about Neptune

Astrogeology Research Program

Browse the Solar System: Interactive version of our popular poster Mapping the Solar System
Browse the Geologic Solar System: Interactive version of our popular poster Geology of the Solar System
Gazetteer of Planetary Nomenclature: Information about and access to the official International Astromical Union approved names for planetary features
Cartographic Coordinates and Rotational Elements of the Planets and Satellites - IAU Working Group: IAU CCRE Working Group, information, publications, and references, including tables of the accepted values for the size, shape, and rotations of the planets and satellites
NASA Planetary Photojournal: Images from various Solar System exploration programs
For images, maps, data, and information about Neptune's moons, see the Triton, and Neptune's Other Moons sections.

Other Web Sites