Difference between revisions of "Adrastea"

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Adrastea is the second known natural satellite of Jupiter by distance and the smallest inner moon. Discovered by photos from Voyager 2 in 1979, it became the first moon discovered by an interplanetary spacecraft, rather than from Earth.
It was known as Jupiter XV until it was named after Adasteia, the foster mother of the Greek god Zeus.
Adrastea is one of the few moons in the Solar System that orbits its planet in less than one of the planet's days. Located at the edge of Jupiter's main ring, it is thought that it contributes material to that ring.

DISCOVERY
Discovered by
Voyager 2
David C Jewitt
G Edward Danielson
Discovery date 8 July 1979
DESIGNATIONS
Adrastea
Jupiter XV
S/1979 J1
ORBITAL CHARACTERISTICS
Parent body Jupiter
Mean Orbital Radius 129000 km
Eccentricity 0.0015
Orbital period 7h9.5m (0.269826d)
Average orbital speed 31.378 km/s
Inclination 0.03° (to Jupiter's equator)
PHYSICAL CHARACTERISTICS
Dimensions 20×16×14 km
Mean radius 8.2 km
Volume ≈2345 km
Rotation period synchronous
Axial tilt zero
Albedo 0.10
Surface Temperature ≈122 K

Jupiter's natural satellites

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Named Satellites: Adrastea | Aitne | Amalthea | Ananke | Aoede | Arche | Autonoe | Callirrhoe | Callisto | Carme | Carpo | Chaldene | Cyllene | Dia | Eirene | Elara | Erinome | Ersa | Euanthe | Eukelade | Eupheme | Euporie | Europa | Eurydome | Ganymede | Harpalyke | Hegemone | Helike | Hermippe | Herse | Himalia | Io | Iocaste | Isonoe | Kale | Kallichore | Kalyke | Kore | Leda | Lysithea | Megaclite | Metis | Mneme | Orthosie | Pandia | Pasiphae | Pasithee | Philophrosyne | Praxidike | Sinope | Sponde | Taygete | Thebe | Thelxinoe | Themisto | Thyone | Valetudo

Numbered Satellites: S/2003 J2 | S/2003 J4 | S/2003 J9 | S/2003 J10 | S/2003 J12 | S/2003 J16 | S/2003 J18 | S/2003 J19 | S/2003 J23 | S/2003 J 24 |S/2010 J1 | S/2010 J2 | S/2011 J1 | S/2011 J2 S/2011 J3 | S/2016 J1 | S/2016 J3 | S/2016 J4 | S/2017 J1 | S/2017 J2 | S/2017 J3 | S/2017 J5 | S/2017 J6 | S/2017 J7 | S/2017 J8 | S/2017 J9 | S/2018 J2 |S/2018 J3 | S/2018 J4 | S/2021 J1 S/2021 J2 | S/2021 J3 | S/2021 J4 | S/2021 J5 | S/2021 J6 | S/2022 J1 | S/2022 J2 | S/2022 J3

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