| Albedo
|
0.41 +
|
| Apoapsis
|
4,545,670,000 km (30.386 AU, 2,824,548,387.417 mi) +
|
| Axial tilt
|
0.494 rad (28.32 °, 31.467 grad) +
|
| Circumference
|
188.925 AU (28,262,777,589.75 km, 17,561,675,806.882 mi) +
|
| Color
|
#3366FF +
|
| Composition
|
80% hydrogen, 19% helium, 1.5% methane, 192 ppm hydrogen deuteride, 1.5 ppm ethane, aerosol traces of ammonia ice, water ice, ammonia hydrosulfide, and methane ice. +
|
| Creation magnetic moment
|
2.42e+25 N-m/T +
|
| Date of discovery
|
23 September 1846 +
|
| Discoverer
|
Johann Gotfried Galle +,
John Couch Adams +,
Urbain Le Verrier +,
Heinrich L. d'Arrest +
|
| Equatorial radius
|
24,764 km (15,387.636 mi) +
|
| Escape speed
|
23.5 km/s (84,600 km/h, 14.602 mi/s, 52,568.003 mph) +
|
| Inclination
|
0.0309 rad (1.769 °, 1.966 grad) +
|
| Magnetic decay time
|
2,200 a (803,550 da) +
|
| Magnetic half life
|
1,525 a (557,006.25 da) +
|
| Mean radius
|
24,622 km (15,299.401 mi) +
|
| Mean temperature
|
53 K (-220.15 °C, -364.27 °F, 95.4 °R) +
|
| Member of
|
Planet +,
Solar system +,
Gas giant +
|
| Modification dateThis property is a special property in this wiki.
|
22 August 2009 00:52:03 +
|
| Name origin
|
Roman god of the sea +
|
| Orbital eccentricity
|
0.0113 +
|
| Orbital speed
|
5.432 km/s (19,555.2 km/h, 3.375 mi/s, 12,151.038 mph) +
|
| Order
|
9 +
|
| Periapsis
|
4,444,450,000 km (29.709 AU, 2,761,653,195.339 mi) +
|
| Planet density
|
1,638 kg/m³ (1.638 g/ml, 102.257 lb/ft³) +
|
| Planet mass
|
1.0243e+26 kg (17.14 M⊕, 0.0539 M♃) +
|
| Planet surface area
|
7,619,000,000 km² (2,941,712,345.935 mi², 14.937 A⊕, 0.123 A♃) +
|
| Polar radius
|
24,341 km (15,124.796 mi) +
|
| Present magnetic moment
|
1.5e+24 N-m/T +
|
| Primary
|
Sun +
|
| Satellite
|
Nereid +,
Triton +
|
| Satellites
|
13 +
|
| Semi-major axis
|
4,495,060,000 km (30.048 AU, 2,793,100,791.378 mi) +
|
| Sidereal day
|
16.11 h (0.671 da) +
|
| Sidereal period
|
60,189.548 da (164.79 a) +
|
| Surface gravity
|
110 m/s² (3,608.924 ft/s², 112.169 g) +
|
| Surface magnetic flux density
|
1.42e-5 T +
|
| Symbol
|
♆ +
|
| Synodic period
|
367.49 da (1.006 a) +
|
| Titius-Bode prediction
|
38.8 AU +
|
| Visiting mission
|
Voyager 2 +
|
| Categories |
Astronomy,
Solar system,
Planet,
Neptune
|
