Jupiter I
| Io Statistics | |
|---|---|
| Discovered by | Simon Marius & Galileo Galilei |
| Date of discovery | 1610 |
| Mass (kg) | 8.94e+22 |
| Mass (Earth = 1) | 1.4960e-02 |
| Equatorial radius (km) | 1,815 |
| Equatorial radius (Earth = 1) | 2.8457e-01 |
| Mean density (gm/cm^3) | 3.55 |
| Mean distance from Jupiter (km) | 421,600 |
| Rotational period (days) | 1.769138 |
| Orbital period (days) | 1.769138 |
| Mean orbital velocity (km/sec) | 17.34 |
| Orbital eccentricity | 0.004 |
| Orbital inclination (degrees) | 0.040 |
| Escape velocity (km/sec) | 2.56 |
| Visual geometric albedo | 0.61 |
| Mean surface temperature | -143°C |
| Magnitude (Vo) | 5.02 |