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

	Triton	Neptune
Discovered By	W. Lassell	Urbain Le Verrier, John Couch Adams, Johann Galle
Date of Discovery	1846	23 September 1846
Average Orbit Distance	354,759 km	4,498,396,441 km
Perihelion/Perigee (closest)	354,759 km	4,459,753,056 km
Aphelion/Apogee (farthest)	354,759 km	4,537,039,826 km
Equatorial Radius	1353.4 km	24,622 km
Equatorial Circumference	8,503.7 km	154,704.6 km
Volume	10,384,058,491 km3	62,525,703,987,421 km3
Mass	21,394,990,550,895,500,000,000 kg	102,410,000,000,000,000,000,000,000 kg
Density	2.059 g/cm3	1.638 g/cm3
Surface Area	23,017,714.99 km2	7,618,272,763 km2
Equatorial Surface Gravity	0.779 m/s2	11.15 m/s2
Escape Velocity	5,229 km/h	84,816 km/h
Mean Orbit Velocity	15,803.2 km/h	19,566 km/h
Orbit Eccentricity	0	0.00859048
Orbit Inclination to Ecliptic	156.865 degrees	1.77 degrees
Orbit Circumference	2,229,016.54 km	28,263,736,967 km