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

	Despina	Neptune
Discovered By	S. Synnott, Voyager 2	Urbain Le Verrier, John Couch Adams, Johann Galle
Date of Discovery	1989	23 September 1846
Average Orbit Distance	52,526 km	4,498,396,441 km
Perihelion/Perigee (closest)	52,515 km	4,459,753,056 km
Aphelion/Apogee (farthest)	52,537 km	4,537,039,826 km
Equatorial Radius	75.0 km	24,622 km
Equatorial Circumference	471.2 km	154,704.6 km
Volume	1,767,146 km3	62,525,703,987,421 km3
Mass	2,098,135,806,336,070,000 kg	102,410,000,000,000,000,000,000,000 kg
Density	1.3 g/cm3	1.638 g/cm3
Surface Area	70,685.83 km2	7,618,272,763 km2
Equatorial Surface Gravity	0.025 m/s2	11.15 m/s2
Escape Velocity	220 km/h	84,816 km/h
Mean Orbit Velocity	41,048.6 km/h	19,566 km/h
Orbit Eccentricity	0.000	0.00859048
Orbit Inclination to Ecliptic	0.07 degree	1.77 degrees