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Distance from the Sun |
mil km | 4,504.3
| mil miles | 2793
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Orbital Period (length of year) |
Earth days | 60,190
| Earth years | 164.795
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Local Days per Year rotations per orbit |
90,097.3
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Length of day in Earth Time |
16h 2m
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Axial Tilt |
28.31�
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Orbital Inclination from Earth's orbit |
1.774�
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Orbital Eccentricity from circular |
0.0097
|
Sidereal Rotation in Earth days |
0.67125
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Mean Orbital Velocity km/s |
5.44
|
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Visual Geometric Albedo |
.41
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Vo or Object's Visible Magnitude at Opposition |
7.84
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Mean Radius km |
24,746
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Mean Diameter at Equator |
km | 49,530
|
miles | 30,198
|
x Earth | 3.81
|
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Mass |
kg | 1.27 e+22
| x Earth | 17
|
Density (grams per cm3)
| 1.64
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Gravity x Earth |
1.19
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Escape Velocity in km per sec
| 23.5
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Neptune, the god of the Sea.
The eighth planet out from the sun is a veritable twin of the next closest planet, Uranus.
The main Neptunian moon is Triton, which has an extremely thin atmosphere: 15 microbars of nitrogen ice.
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