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

	Neso	Neptune
Discovered By	Matthew J. Holman, John J. Kavelaars, Tommy Grav, Wesley C. Fraser, and Dan Milisavljevic	Urbain Le Verrier, John Couch Adams, Johann Galle
Date of Discovery	2002	23 September 1846
Average Orbit Distance	49,285,000 km	4,498,396,441 km
Perihelion/Perigee (closest)	21,123,551 km	4,459,753,056 km
Aphelion/Apogee (farthest)	77,446,449 km	4,537,039,826 km
Equatorial Radius	30.0 (assuming an albedo of 0.04) km	24,622 km
Equatorial Circumference	188.5 km	154,704.6 km
Volume	113,097 km3	62,525,703,987,421 km3
Mass	164,853,527,640,691,000 kg	102,410,000,000,000,000,000,000,000 kg
Density	1.5 g/cm3	1.638 g/cm3
Surface Area	11,309.73 km2	7,618,272,763 km2
Equatorial Surface Gravity	0.012 m/s2	11.15 m/s2
Escape Velocity	97 km/h	84,816 km/h
Orbit Period (Length of Year)	26.6686653 sidereal years	164.79132 sidereal years
Mean Orbit Velocity	1,208.8 km/h	19,566 km/h
Orbit Eccentricity	0.5714	0.00859048
Orbit Inclination to Ecliptic	136.439	1.77 degrees
Orbit Circumference	282,584,902.19 km	28,263,736,967 km