| Discovered By | Galileo Galilei |
| Date of Discovery | 1610 |
| Average Distance from Jupiter | 1,070,000 km (metric) |
| Equatorial Radius | 2,634 km (metric) |
| Mass | 148,186,000,000,000,000,000,000 kg (metric) |
| Orbit Period (Length of Year) | 7.15455296 Earth days |
| Orbital Eccentricity | 0.002 |
| Orbital Inclination to Ecliptic | 0.21° |
| Atmospheric Constituents | Oxygen |
