| Discovered by
| Simon Marius & Galileo Galilei
|
| Date of discovery
| January 7, 1610
|
| Mass (kg)
| 8.9319e+22
|
| Mass (Earth = 1)
| 1.4960e-02
|
| Equatorial radius (km)
| 1821.6
|
| Reference ellipsoid (km)
| 1830x1819.2x1815.6
|
| Mean density (gm/cm^3)
| 3.55278
|
| Mean distance from Jupiter (km)
| 421,600
|
| Rotational period (days)
| 1.769138
|
| Rotational Period (days, hours, minutes)
| 1 day, 18 hours, 27 minutes
|
| 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 |
| Highest point (name, height in km)
| Boosaule Mons (south peak), 15.8 km |
| Lowest point (name, height in km)
|
Kanehekili or Culann
|
| Surface Gravity (Earth=1)
|
0.183
|
| Heat Flow
|
2.5-13.5
W/m2
|
