MoonMoon of Jupiter
S/2021 J 4
A small irregular moon of Jupiter discovered in 2021.
2km
Diameter23,065,000km
From Jupiter719.8days
Orbital Period2021
DiscoveredAbout
S/2021 J 4 is a small irregular moon of Jupiter discovered in 2021.
Properties
2km
Diameter23,065,000km
Semi-major Axis719.80days
Orbital Period2021
Discovery YearScott S. Sheppard
Discovered ByOther Moons of Jupiter

Io
The most volcanically active body in the solar system and innermost Galilean moon.
3,643.2 km
Diameter
1.8 d
Orbit
1610
Discovered

Europa
Jupiter moon with a subsurface ocean considered a prime candidate for extraterrestrial life.
3,121.6 km
Diameter
3.6 d
Orbit
1610
Discovered

Ganymede
The largest moon in the solar system, bigger than Mercury, with its own magnetic field.
5,268.2 km
Diameter
7.2 d
Orbit
1610
Discovered

Callisto
Jupiter's second-largest moon with the most cratered surface in the solar system.
4,820.6 km
Diameter
16.7 d
Orbit
1610
Discovered