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

	Galatea	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	61,953 km	4,498,396,441 km
Perihelion/Perigee (closest)	61,947 km	4,459,753,056 km
Aphelion/Apogee (farthest)	61,959 km	4,537,039,826 km
Equatorial Radius	88.0 km	24,622 km
Equatorial Circumference	552.9 km	154,704.6 km
Volume	2,854,543 km3	62,525,703,987,421 km3
Mass	3,746,671,082,742,980,000 kg	102,410,000,000,000,000,000,000,000 kg
Density	1.3 g/cm3	1.638 g/cm3
Surface Area	97,313.97 km2	7,618,272,763 km2
Equatorial Surface Gravity	0.032 m/s2	11.15 m/s2
Escape Velocity	271 km/h	84,816 km/h
Mean Orbit Velocity	37,807.1 km/h	19,566 km/h
Orbit Eccentricity	0.0001	0.00859048
Equatorial Inclination to Orbit	0.034	28.3 degrees
Orbit Circumference	389,262.18 km	28,263,736,967 km