Neptune Statistics
| Planetary Symbol: |
 |
Name in Roman/Greek Mythology: |
Neptune/Poseidon |
| Diameter: |
49,493 km (30,760 miles) |
Rotation Period about Axis: |
17.24 hrs |
| Mass: |
102.4x10^24 kilograms (17.2 x Earth's) |
Revolution Period about the Sun: |
165 years |
| Density: |
1,638 kg/m^3 |
Tilt of Axis: |
29o 36" |
| Minimum Distance from Sun: |
4.46 billion km
(2.77 billion miles) |
Surface Gravity: |
11 m/s^2 (1.12 x Earth's) |
| Maximum Distance from Sun: |
4.54 billion km
(2.82 billion miles) |
Temperature at Cloud Tops: |
-210o C ( -346o F) |
| Orbital Semimajor Axis: |
30.07 AU (Earth=1 AU) |
Average Cloud Top Temperature (K): |
63K |
| Minimum Distance from Earth: |
4.3 billion km
(2.68 billion miles) |
Satellites/Rings: |
known moons, faint rings |
Neptune Image Archive
Comparative Planetary Statistics -- in table form
Comparative Orbital Statistics -- in table form
Actual Distance to Earth
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