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

	Charon	Pluto
Discovered By	James Christie	Clyde Tombaugh
Date of Discovery	June 22, 1978	1930
Average Orbit Distance	17,536 km	5,906,440,628 km
Perihelion/Perigee (closest)	17,497 km	4,436,756,954 km
Aphelion/Apogee (farthest)	17,575 km	7,376,124,302 km
Equatorial Radius	603.6 km	1,151 km
Equatorial Circumference	3,792.5 km	7,231.9 km
Volume	921,162,612 km3	6,387,259,783 km3
Mass	1,546,625,822,956,300,000,000 kg	13,090,000,000,000,000,000,000 kg
Density	1.678 g/cm3	2.050 g/cm3
Surface Area	4,578,343.00 km2	16,647,940 km2
Equatorial Surface Gravity	0.283 m/s2	0.66 m/s2
Escape Velocity	2,105 km/h	4,428 km/h
Orbit Period (Length of Year)	6.387 sidereal years	247.92065 sidereal years
Mean Orbit Velocity	718.8 km/h	16,809 km/h
Orbit Eccentricity	0.0022	0.2488273
Orbit Inclination to Ecliptic	0.001	17.14 degrees
Orbit Circumference	110,181.80 km	36,529,978,039 km