| Albedo
|
0.64 +
|
| Apoapsis
|
677,408 km (0.00453 AU, 420,921.817 mi) +
|
| Axial tilt
|
2.79253e-4 rad (0.016 °, 0.0178 grad) +
|
| Color
|
#EEFFFF +
|
| Composition
|
Water ice and rock +
|
| Creation magnetic moment
|
1.13e+22 N-m/T +
|
| Date of discovery
|
7 January 1610 +
|
| Discoverer
|
Galileo Galilei +,
Simon Marius +
|
| Escape speed
|
2.02 km/s (7,272 km/h, 1.255 mi/s, 4,518.611 mph) +
|
| Inclination
|
0.0082 rad (0.47 °, 0.522 grad) +
|
| Lunar mass
|
4.8e+22 kg (0.653 M☾, 0.00803 M⊕) +
|
| Lunar surface area
|
30,612,893 km² (11,819,704.067 mi², 0.807 A☾, 0.06 A⊕) +
|
| Magnetic decay time
|
861.93 a (314,819.932 da) +
|
| Magnetic half life
|
597.45 a (218,218.612 da) +
|
| Maximum temperature
|
110 K (-163.15 °C, -261.67 °F, 198 °R) +
|
| Mean radius
|
1,560.8 km (969.836 mi) +
|
| Member of
|
Moon +,
Solar system +,
Galilean moons +
|
| Minimum temperature
|
50 K (-223.15 °C, -369.67 °F, 90 °R) +
|
| Orbital eccentricity
|
0.0094 +
|
| Orbital speed
|
13.74 km/s (49,464 km/h, 8.538 mi/s, 30,735.505 mph) +
|
| Order
|
6 +
|
| Periapsis
|
664,792 km (0.00444 AU, 413,082.598 mi) +
|
| Planet density
|
3,013 kg/m³ (3.013 g/ml, 188.095 lb/ft³) +
|
| Present magnetic moment
|
9.13e+18 N-m/T +
|
| Primary
|
Jupiter +
|
| Rotation speed
|
0.032 km/s (115.056 km/h, 0.0199 mi/s, 71.492 mph) +
|
| Semi-major axis
|
671,100 km (0.00449 AU, 417,002.207 mi) +
|
| Sidereal day
|
85.228 h (3.551 da) +
|
| Sidereal period
|
3.551 da (0.00972 a) +
|
| Surface gravity
|
1.324 m/s² (4.344 ft/s², 0.135 g) +
|
| Surface magnetic flux density
|
2.4e-7 T +
|
| Visiting mission
|
Pioneer 10 +,
Pioneer 11 +,
Voyager 1 +,
Voyager 2 +,
Galileo project +
|
| Categories |
Astronomy +,
Solar system +,
Moon +,
Jupiter +
|
