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Comparison Chart
Comparison: Neptune vs. Neptune

This chart shows the differences between Neptune and Neptune. To change the planets/moons being compared, change one or more of the form fields at the bottom and click Refresh.

Discovered By
Urbain Le Verrier, John Couch Adams, Johann Galle
Urbain Le Verrier, John Couch Adams, Johann Galle
Date of Discovery
23 September 1846
23 September 1846
Average Orbit Distance
4,498,396,441 km
4,498,396,441 km
Perihelion (closest)
4,459,753,056 km
4,459,753,056 km
Aphelion (farthest)
4,537,039,826 km
4,537,039,826 km
Equatorial Radius
24,622 km
24,622 km
Equatorial Circumference
154,704.6 km
154,704.6 km
Volume
62,525,703,987,421 km3
62,525,703,987,421 km3
Mass
102,410,000,000,000,000,000,000,000 kg
102,410,000,000,000,000,000,000,000 kg
Density
1.638 g/cm3
1.638 g/cm3
Surface Area
7,618,272,763 km2
7,618,272,763 km2
Equatorial Surface Gravity
11.15 m/s2
11.15 m/s2
Escape Velocity
84,816 km/h
84,816 km/h
Rotation Period (Length of Day)
0.671 sidereal days
0.671 sidereal days
Orbit Period (Length of Year)
164.79132 sidereal years
164.79132 sidereal years
Mean Orbit Velocity
19,566 km/h
19,566 km/h
Orbit Eccentricity
0.00859048
0.00859048
Orbit Inclination to Ecliptic
1.77 degrees
1.77 degrees
Equatorial Inclination to Orbit
28.3 degrees
28.3 degrees
Orbit Circumference
28,263,736,967 km
28,263,736,967 km
Effective Temperature
-214 °C
-214 °C
Atmospheric Constituents
Hydrogen, Helium, Methane
Hydrogen, Helium, Methane

 

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Last Updated: 28 Apr 2014