





Urbain Le Verrier, John Couch Adams, Johann Galle 










Orbit Size Around Sun (semimajor axis) 


Metric: 4,498,396,441 km 
English: 2,795,173,960 miles 
Scientific Notation:
4.4983964 x 10^{9} km (3.0069923 x 10^{1} A.U.)

By Comparison: 30.070 x Earth 






Metric: 4,459,753,056 km 
English: 2,771,162,074 miles 
Scientific Notation:
4.45975 x 10^{9} km (2.981 x 10^{1} A.U.)

By Comparison: 30.318 x Earth 






Metric: 4,537,039,826 km 
English: 2,819,185,846 miles 
Scientific Notation:
4.53704 x 10^{9} km (3.033 x 10^{1} A.U.)

By Comparison: 29.830 x Earth 






Metric: 28,263,736,967 km 
English: 17,562,271,937 miles 
Scientific Notation: 2.826 x 10^{10} km 
By Comparison: 30.071 x Earth 






Metric: 19,566 km/h 
English: 12,158 mph 
Scientific Notation: 5.4349 x 10^{3} m/s 
By Comparison: 0.182 x Earth 






0.00859048 
By Comparison: 0.514 x Earth 










Equatorial Inclination to Orbit 








Metric: 24,622 km 
English: 15,299.4 miles 
Scientific Notation: 2.4622 x 10^{4} km 
By Comparison: 3.8647 x Earth 






Metric: 154,704.6 km 
English: 96,129.0 miles 
Scientific Notation: 1.54705 x 10^{5} km 
By Comparison: 3.8647 x Earth 






Metric: 62,525,703,987,421 km^{3} 
English: 15,000,714,125,712 mi^{3} 
Scientific Notation: 6.25257 x 10^{13} km^{3} 
By Comparison: 57.723 x Earth 






Metric: 102,410,000,000,000,000,000,000,000 kg 
Scientific Notation: 1.0241 x 10^{26} kg 
By Comparison: 17.148 x Earth 






Metric: 1.638 g/cm^{3} 
By Comparison: 0.297 x Earth 






Metric: 7,618,272,763 km^{2} 
English: 2,941,431,558 square miles 
Scientific Notation: 7.6183 x 10^{9} km^{2} 
By Comparison: 14.980 x Earth 






Metric: 11.15 m/s^{2} 
English: 36.6 ft/s^{2} 
By Comparison: If you weigh 100 pounds on Earth, you would weigh 114 pounds on Neptune. 






Metric: 84,816 km/h 
English: 52,702 mph 
Scientific Notation: 2.356 x 10^{4} m/s 
By Comparison: By Comparison: 2.105 x Earth. 




Sidereal Rotation Period (Length of Day) 


0.671 Earth days 
16.11000 hours 
By Comparison: 0.67 x Earth 






Metric: 214 °C 
English: 353 °F 
Scientific Notation: 59 K 






Hydrogen, Helium, Methane 
Scientific Notation: H_{2}, He, CH_{4} 
By Comparison: Earth atmosphere consists mostly of N_{2} and O_{2}. 





