A small signal in Voyager’s survey.
Adrastea was discovered by the Voyager science team in July 1979. It is the smallest of the four inner moons Metis, Adrastea, Amalthea and Thebe. Its size and uneven outline offer only a limited guide to the surface depicted here.
Small moon, dusty surroundings.
Adrastea and Metis supply material to Jupiter’s main ring. Both travel around the planet faster than Jupiter rotates. The thin, dusty ring environment is distinct from the broad bright rings familiar from Saturn.
Gravity remains unassigned.
The adopted mean diameter is 16.4 kilometers. The published mass parameter is smaller than its own uncertainty. A precise-looking jump animation would overstate that evidence, so the gravity panel remains unquantified and the interior unresolved.
Just over seven hours.
The mean orbital scale is 129,000 kilometers from Jupiter’s center, with a period of 0.298260 Earth days. The adopted table rounds eccentricity to zero. The rotation period is not treated as measured; the separate rotation panel explains the uncertainty.
