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Comparison Chart
Comparison: Charon vs. Pluto

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.

Discovered By
James Christie
Clyde Tombaugh
Date of Discovery
June 22, 1978
18 Feb 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
921,162,612 km3
6,387,259,783 km3
1,546,625,822,956,300,000,000 kg
13,032,000,000,000,000,000,000 kg
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)
0.017486653 sidereal years
247.92065 sidereal years
Mean Orbit Velocity
718.8 km/h
16,809 km/h
Orbit Eccentricity
Orbit Inclination to Ecliptic
17.14 degrees
Orbit Circumference
110,181.80 km
36,529,978,039 km


New planets/moons to compare:

System of measurement:

Compare All Eight Planets

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Last Updated: 17 Jul 2015