Moon
An icy moon of Jupiter believed to hide a subsurface ocean beneath its frozen crust.
| Type | Moon |
|---|---|
| Orbits | Jupiter |
| Distance from parent body | 671,100 km |
| Diameter | 3,122 km |
| Mass | 4.80 × 10^22 kg |
| Surface gravity | 1.31 m/s² |
| Temperature | -171°C |
| Orbital period | 4 days |
| Apparent magnitude | 5.3 |
| Redshift | 0 |
| Discovered | 1610 |
At 3,122 km across, Europa is 90 percent of the diameter of Earth's Moon.
Its mass is 0.8 percent of the mass of Earth.
It orbits Jupiter at 671,100 km, further out than the Moon orbits Earth.
A single orbit takes 3.5 days.
An average temperature of 102 K works out at -171 degrees Celsius, colder than the 15 degrees Earth averages.
It has been on record since 1610.
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