National Aeronautics and Space Administration Logo
Follow this link to skip to the main content NASA Banner
Solar System Exploration
Facebook Twitter YouTube Facebook Twitter YouTube Flickr iTunes
Follow Us
Comparison Chart
Comparison: Themisto vs. Jupiter

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

Discovered By
First time: Charles Thomas Kowal and Elizabeth Roemer
Second time: Scott Sander Sheppard, David C. Jewitt, Yanga Roland Fernández and Eugene A. Magnier
Known by the Ancients
Date of Discovery
First time: 30 September 1975
Second time: 6 August 2000
Average Orbit Distance
7,507,000 km
778,340,821 km
Perihelion/Perigee (closest)
5,687,303 km
740,679,835 km
Aphelion/Apogee (farthest)
9,326,697 km
816,001,807 km
Equatorial Radius
4.0 (assuming an albedo of 0.04) km
69,911 km
Equatorial Circumference
25.1 km
439,263.8 km
268 km3
1,431,281,810,739,360 km3
689,387,479,224,709 kg
1,898,130,000,000,000,000,000,000,000 kg
2.6 g/cm3
1.326 g/cm3
Surface Area
201.06 km2
61,418,738,571 km2
Equatorial Surface Gravity
0.003 m/s2
24.79 m/s2
Escape Velocity
17 km/h
216,720 km/h
Orbit Period (Length of Year)
0.355975359 sidereal years
11.862615 sidereal years
Mean Orbit Velocity
14,891.0 km/h
47,002 km/h
Orbit Eccentricity
Orbit Inclination to Ecliptic
1.304 degrees
Orbit Circumference
46,467,175.95 km
4,887,595,931 km


New planets/moons to compare:

System of measurement:

Compare All Eight Planets

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 Writers: Courtney O'Connor and Bill Dunford
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
> NASA Advisory Council
> Open Government at NASA
Last Updated: 25 Mar 2015