National Aeronautics and Space Administration Logo
Follow this link to skip to the main content NASA Banner
Solar System Exploration
Planets
Facebook Twitter YouTube Facebook Twitter YouTube Flickr iTunes
Follow Us
Charon: Facts & Figures
   Back to Pluto   Overview   Gallery   Facts & Figures   Education   News 
Discovered By
James Christie
Date of Discovery
June 22, 1978
Orbit Size Around Pluto (semi-major axis)
Metric: 17,536 km
English: 10,896 miles
Scientific Notation: 1.754E+04 km (1.172E-04 A.U.)
Periapsis (closest)
Metric: 17,497 km
Apoapsis (farthest)
Metric: 17,575 km
English: 10,920 miles
Scientific Notation: 1.757E+04 km
Orbit Circumference
Metric: 110,181.80 km
English: 68,463.80 miles
Scientific Notation: 1.102E+05 km
Average Orbit Velocity
Metric: 718.8 km/h
English: 446.6 mph
Scientific Notation: 200 m/s
Orbit Eccentricity
0.0022
Orbit Inclination
0.001
Mean Radius
Metric: 603.6 km
English: 375.1 miles
Scientific Notation: 6.036E+02 km
Equatorial Circumference
Metric: 3,792.5 km
English: 2,356.6 miles
Scientific Notation: 3.7925E+03 km
Volume
Metric: 921,162,612 km3
Scientific Notation: 9.212E+08 km3
Mass
Metric: 1,546,625,822,956,300,000,000 kg
English: 1.5466E+21 lbs
Scientific Notation: 0.0003 kg
Density
Metric: 1.678 g/cm3
Surface Area
Metric: 4,578,343.00 km2
English: 1,767,708.12 square miles
Scientific Notation: 4.578343E+06 km2
Surface Gravity
Metric: 0.283 m/s2
English: 0.929 ft/s2
Scientific Notation: 2.833E-01 m/s2
Escape Velocity
Metric: 2,105 km/h
English: 1,308 mph
Scientific Notation: 585 m/s
Sidereal Rotation Period (Length of Day)
6.387 hours
Awards and Recognition   Solar System Exploration Roadmap   Contact Us   Site Map   Print This Page
NASA Official: Kristen Erickson
Advisory: Dr. James Green, Director of Planetary Science
Outreach Manager: Alice Wessen
Curator/Editor: Phil Davis
Science Writer: Autumn Burdick
Producer: Greg Baerg
Webmaster: David Martin
> NASA Science Mission Directorate
> Budgets, Strategic Plans and Accountability Reports
> Equal Employment Opportunity Data
   Posted Pursuant to the No Fear Act
> Information-Dissemination Policies and Inventories
> Freedom of Information Act
> Privacy Policy & Important Notices
> Inspector General Hotline
> Office of the Inspector General
> NASA Communications Policy
> USA.gov
> ExpectMore.gov
> NASA Advisory Council
> Open Government at NASA
Last Updated: 12 Aug 2013