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

	Iapetus	Saturn
Discovered By	G.D. Cassini	Known by the Ancients
Date of Discovery	1671	Unknown
Average Orbit Distance	3,560,851 km	1,426,666,422 km
Perihelion/Perigee (closest)	3,456,518 km	1,349,823,615 km
Aphelion/Apogee (farthest)	3,665,184 km	1,503,509,229 km
Equatorial Radius	735.6 km	58,232 km
Equatorial Circumference	4,621.9 km	365,882.4 km
Volume	1,667,300,080 km3	827,129,915,150,897 km3
Mass	1,805,952,411,282,580,000,000 kg	568,319,000,000,000,000,000,000,000 kg
Density	1.083 g/cm3	0.687 g/cm3
Surface Area	6,799,755.63 km2	42,612,133,285 km2
Equatorial Surface Gravity	0.223 m/s2	10.4* m/s2
Escape Velocity	2,061 km/h	129,924 km/h
Mean Orbit Velocity	11,748.8 km/h	34,701 km/h
Orbit Eccentricity	0.0293	0.05386179
Orbit Inclination to Ecliptic	8.313 degrees	2.49 degrees
Orbit Circumference	22,368,684.06 km	8,957,504,604 km