S/2003 J 18

S/2003 J 18 is a natural satellite of Jupiter. It was discovered by a team of astronomers led by Brett J. Gladman in 2003.^[1]^[2]

S/2003 J 18 is about 2 kilometres in diameter, and orbits Jupiter at an average distance of 19,813 Mm in 569.728 days, at an inclination of 147° to the ecliptic (149° to Jupiter's equator), in a retrograde direction and with an eccentricity of 0.1570.

It belongs to the Ananke group, retrograde irregular moons which orbit Jupiter between 19.3 and 22.7 Gm, at inclinations of roughly 150°.

References

↑ IAUC 8116: Satellites of Jupiter and Saturn 2003 April (discovery)
↑ MPEC 2003-G20: S/2003 J 18 2003 April (discovery and ephemeris)

Moons of Jupiter

Listed in approximately increasing distance from Jupiter. Temporary names in italics.

Inner moons

Galilean moons

Io
Europa
Ganymede
Callisto

Themisto group

Themisto

Himalia group

Carpo group

Carpo

S/2003 J 12

S/2011 J 1

Ananke group

Core	Ananke Praxidike Harpalyke Iocaste Euanthe Thyone

Peripheral	Euporie S/2003 J 3 S/2003 J 18 Jupiter LII Thelxinoe Helike Orthosie S/2003 J 16 Hermippe Mneme S/2003 J 15

Carme group

Pasiphae group

S/2003 J 2

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