Adrastea
Moon· orbits Jupiter
Adrastea — moon of Jupiter.
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Key facts
Mass (est.)
2.10 × 10¹⁵ kg
0.0000000286 Moon masses
Radius
8.2 km
Surface gravity
0.00208 m/s²
0% of Earth's gravity
Orbit around Jupiter
7.2 hours
0.30 Earth days
Science
Physical
- Mass (estimated)
- 2.10 × 10¹⁵ kg · 0.0000000286 Moon masses
- Estimated from its size and an assumed density (~0.9 g/cm3); the GM is not dynamically constrained, so this is not a measurement. Source: JPL SSD Planetary Satellite Physical Parameters (GM JUP365).
- Radius
- 8.2 km
- JPL SSD Planetary Satellite Physical Parameters (mean radius)
- Surface gravity
- 0.00208 m/s² · 0% of Earth's gravity
- Estimated from the estimated mass and radius
- Escape velocity
- 5.84 m/s · 0% of Earth's escape velocity
- Estimated from the estimated mass and radius
Orbit around Jupiter
- Distance from Jupiter
- 129,000 km
- From JPL orbital elements
- Orbital period
- 7.16 hours
- From JPL orbital elements
- Eccentricity
- 0
- From JPL orbital elements
- Inclination to Jupiter's Laplace plane
- 0.00 °
- From JPL orbital elements · The Laplace plane is the one a moon's orbit precesses about: close in it is the planet's equatorial plane, the plane of the rings, and further out it tilts toward the planet's own orbit.
Radiation & temperature
- Insolation
- 0.0354 S⊕ · 4% of the sunlight Earth receives
- Computed from the distance to the Sun (inverse-square; Earth's sunlight = 1), before any atmosphere.
Discovery & history
- By
- Voyager Science Team
Adrastea was discovered in 1979 by Voyager Science Team. Jupiter's moons are named after lovers, daughters and descendants of the god Jupiter (the Greek Zeus). Beyond its discovery and naming, little more about it has been individually recorded.
Images
Images from open archives · credit shown per image