| Mass | 8.94*1025 g |
| Average Density | 3.55 g/cm³ |
| Equatorial Radius | 1.815*106 cm |
| Period of Rotation | 1.769138d |
| Orbital Radius | 4.216*1010 cm |
| Orbital Period | 1.769138d |
| Mean Surface Temperature | -143°C |
| Discovered | 1610 by Simon Marius & Galileo Galilei |
Satellite of Jupiter
