Neptune
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| Neptune | |
|---|---|
| |
| Neptune in Orbiter | |
| Designation | |
| Name | Neptune |
| Reference body | Sun |
| Number of satellites | |
| Planetary mean orbits | |
| Epoch | J2000 (1 January 2000) |
| Semimajor axis (a) | 30.06896348 AU (4.49825291×1012 km) |
| Eccentricity (e) | 0.00858587 |
| Inclination (i) | 1.76917° (0.0308778 radian) |
| Longitude of the ascending node (LAN, ☊) | 131.72169° (2.298977 radian) |
| Longitude of periapsis (ϖ) | 44.97135° (0.784898 radian) |
| Mean longitude (L) | 304.88003° (5.321160 radian) |
| Planetary orbital element centennial rates | |
| Semimajor axis (a) | -0.00125196 AU/Century |
| Eccentricity (e) | 0.0000251 Century-1 |
| Inclination (i) | -3.64 seconds/Century |
| Longitude of the ascending node (LAN, ☊) | -151.25 seconds/Century |
| Longitude of periapsis (ϖ) | -844.43 seconds/Century |
| Mean longitude (L) | 786449.21 seconds/Century |
| Selected physical parameters | |
| Mean radius | 24624.0±21 km |
| Mass | 1.024569×1026 kg |
| Density | 1.638 g/cm3 |
| Sidereal rotation period | 16.11±0.01 hours |
| Sidereal orbit period | 163.72321 years |
| Magnitude V(1,0) | -6.87 |
| Geometric albedo | 0.41 |
| Equatorial gravity | 11.00±0.05 m/s2 |
| Escape velocity | 23.5 km/s |
| Rotation elements | |
| North pole right ascension (α1) | 295.25° |
| North pole declination (δ1) | 40.63° |
| Obliqutiy of ecliptic | 29.48° |
| Longitude of Sun's transit | 221.13° |
| Atmospheric parameters | |
| Surface Pressure | >>104 kPa |
| Surface Density | ~0.45 kg/m3 at 1 bar |
| Scale height | 19.1-20.3 km |
| Average temperature | ~58 K |
| Wind speeds | 0-200 m/s |
| Ecliptic position from primary* | |
| Note | *Elements given are from Orbiter.pdf (2016) |
Neptune is the 8th planet from the Sun. It has 14 known natural satellites.
see also: Wikipedia [1]
Go to Addons for Neptune
Natural satellites
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