| Albedo
|
0.2 +
|
| Apoapsis
|
1,896,632 km (0.0127 AU, 1,178,512.487 mi) +
|
| Color
|
#995555 +
|
| Composition
|
60% rock and 40% ice +
|
| Date of discovery
|
7 January 1610 +
|
| Discoverer
|
Galileo Galilei +,
Simon Marius +
|
| Escape speed
|
2.45 km/s (8,820 km/h, 1.522 mi/s, 5,480.494 mph) +
|
| Inclination
|
0.0049 rad (0.281 °, 0.312 grad) +
|
| Lunar mass
|
1.076e+23 kg (1.464 M☾, 0.018 M⊕) +
|
| Lunar surface area
|
73,004,909 km² (28,187,352.949 mi², 1.925 A☾, 0.143 A⊕) +
|
| Maximum temperature
|
168 K (-105.15 °C, -157.27 °F, 302.4 °R) +
|
| Mean radius
|
2,410.3 km (1,497.691 mi) +
|
| Mean temperature
|
126 K (-147.15 °C, -232.87 °F, 226.8 °R) +
|
| Member of
|
Moon +,
Solar system +,
Galilean moons +
|
| Orbital eccentricity
|
0.0074 +
|
| Orbital speed
|
8.21 km/s (29,556 km/h, 5.101 mi/s, 18,365.247 mph) +
|
| Order
|
8 +
|
| Periapsis
|
1,868,768 km (0.0125 AU, 1,161,198.6 mi) +
|
| Planet density
|
1,834 kg/m³ (1.834 g/ml, 114.493 lb/ft³) +
|
| Primary
|
Jupiter +
|
| Rotation speed
|
0.0105 km/s (37.8 km/h, 0.00652 mi/s, 23.488 mph) +
|
| Semi-major axis
|
1,882,700 km (0.0126 AU, 1,169,855.544 mi) +
|
| Sidereal day
|
400.536 h (16.689 da) +
|
| Sidereal period
|
16.689 da (0.0457 a) +
|
| Surface gravity
|
1.236 m/s² (4.054 ft/s², 0.126 g) +
|
| Visiting mission
|
Voyager 1 +,
Voyager 2 +,
Galileo project +
|
| Categories |
Astronomy +,
Solar system +,
Moon +,
Jupiter +
|
