| Distance from the Sun: 4,498,252,900 km Equatorial Radius: 24,764 km Volume: 62,526,000,000,000 km3 Mass: 102,440,000,000,000,000,000,000,000 kg Neptune's crust = 774 miles thick |
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| Discovered By: | Johann Galle |
| Date of Discovery: | 1846 |
| Average Distance from the Sun | Metric: 4,498,252,900 km English: 2,795,084,800 miles Scientific Notation: 4.4982529 x 109 km (30.069 A.U.) By Comparison: 30.069 x Earth |
| Perihelion (closest) | Metric: 4,459,630,000 km English: 2,771,087,000 miles Scientific Notation: 4.45963 x 109 km (29.811 A.U.) By Comparison: 29.820 x Earth |
| Aphelion (farthest) | Metric: 4,536,870,000 km English: 2,819,080,000 miles Scientific Notation: 4.53687 x 109 km (30.327 A.U.) By Comparison: 30.326 x Earth |
| Equatorial Radius | Metric: 24,764 km English: 15,388 miles Scientific Notation: 2.4764 x 104 km By Comparison: 3.883 x Earth |
| Equatorial Circumference | Metric: 155,597 km English: 96,683 miles Scientific Notation: 1.55597 x 105 km |
| Volume |
Metric: 62,526,000,000,000 km3 Scientific Notation: 6.2526 x 1013 km3 By Comparison: 57.7 x Earth |
| Mass | Metric: 102,440,000,000,000,000,000,000,000 kg Scientific Notation: 1.0244 x 1026 kg By Comparison: 17.147 x Earth |
| Density | Metric: 1.76 g/cm3 By Comparison: 0.317 x Earth |
| Surface Area |
Metric: 7,640,800,000 km2 English: 2,950,100,000 square miles Scientific Notation: 7.6408 x 109 km2 By Comparison: 14.980 x Earth |
| Equatorial Surface Gravity |
Metric: 10.71 m/s2 English: 35.14 ft/s2 By Comparison: If you weigh 100 pounds on Earth, you would weigh 110 pounds on Neptune. |
| Escape Velocity |
Metric: 85,356 km/h English: 53,038 mph Scientific Notation: 23,710 m/s By Comparison: Escape velocity of Earth is 25,022 mph. |
| Sidereal Rotation Period (Length of Day) | 0.67125 Earth days 16.11 hours By Comparison: 0.673 x Earth |
| Mean Orbit Velocity | Metric: 19,720 km/h English: 12,253 mph Scientific Notation: 5,477.8 m/s By Comparison: 0.490 x Earth |
| Orbital Eccentricity | .00859 By Comparison: 0.514 x Earth |
| Orbital Inclination to Ecliptic | 1.769 degrees |
| Equatorial Inclination to Orbit |
29.58 degrees By Comparison: 1.261 x Earth |
| Orbital Circumference | Metric: 28,142,000,000 km English: 17,487,000,000 miles Scientific Notation: 2.8142 x 1010 km By Comparison: 30.44 x Earth |
| Effective Temperature | Metric: -214 °C English: -353 °F Scientific Notation: 59 K |
| Atmospheric Constituents | Hydrogen, Helium, Methane Scientific Notation: H2, He, CH4 By Comparison: Earth atmosphere consists mostly of N2 and O2. |
| Additional Information: | |
