Cyllene
Discovery
Discovered by	Scott S. Sheppard et al.
Discovery date	2003
Designations
Designation	Jupiter XLVIII
Pronunciation	/səˈliːniː/^[1]
Named after	Κυλλήνη Kyllēnē
Alternative names	S/2003 J 13
Adjectives	Cyllenean /sɪləˈniːən/^[a]
Orbital characteristics ^[4]
Semi-major axis	24349000 km
Eccentricity	0.319
Orbital period (sidereal)	−737.8 days
Inclination	149.3°
Satellite of	Jupiter
Group	Pasiphae group
Physical characteristics
Mean diameter	2 km
Apparent magnitude	23.2

Cyllene /səˈliːniː/, also known as Jupiter XLVIII, is a natural satellite of Jupiter. It was discovered by a team of astronomers from the University of Hawaii led by Scott S. Sheppard in 2003, receiving the temporary designation S/2003 J 13.^[5]^[6]

Cyllene is about 2 kilometres in diameter, and orbits Jupiter at an average distance of (23.4 million km) 23,396,000 km in 731.099 days (2.00 earth years), at an inclination of 140.149° to the ecliptic (139.543° to Jupiter's equator), in a retrograde direction and with an eccentricity of 0.4116.

It was named in March 2005 after Cyllene, a naiad (stream nymph) or oread (mountain nymph) associated with Mount Cyllene, Greece.^[7] She was a daughter of Zeus (Jupiter).

It belongs to the Pasiphae group, irregular retrograde moons orbiting Jupiter at distances ranging between 22.8 and 24.1 Gm, and with inclinations ranging between 144.5° and 158.3°.

References

^ The adjective 'Cyllenean' is also used for Mercury,^[2] though rarely, as for that referent the form is normally 'Cyllenian' /səˈliːniən/.^[3]

^ Noah Webster (1884) A Practical Dictionary of the English Language
^ Thomas Chase (1882) Six books of the Æneid of Virgil (1877), p. 252
^ "Cyllenian". Oxford English Dictionary (Online ed.). Oxford University Press. (Subscription or participating institution membership required.)
^ S.S. Sheppard (2019), Moons of Jupiter, Carnegie Science, on line
^ IAUC 8116: Satellites of Jupiter and Saturn Archived 2006-05-05 at the Wayback Machine 2003 April (discovery)
^ MPEC 2003-G09: S/2003 J 13 2003 April (discovery and ephemeris)
^ IAUC 8502: Satellites of Jupiter 2005 March (naming the moon)

v t e Moons of Jupiter
Listed in increasing approximate distance from Jupiter
Inner moons	Metis Adrastea Amalthea Thebe
Galilean moons	Io Europa Ganymede Callisto
Themisto	Themisto
Himalia group (9)	Leda Ersa S/2018 J 2 Himalia Pandia Lysithea Elara S/2011 J 3 Dia
Carpo group (2)	S/2018 J 4 Carpo
Valetudo	Valetudo
Ananke group (26)	Euporie Jupiter LV Eupheme S/2021 J 3 Jupiter LII Jupiter LIV Mneme Euanthe S/2003 J 16 Harpalyke Orthosie S/2022 J 3 Helike S/2021 J 2 Praxidike Jupiter LXIV S/2021 J 1 S/2003 J 12 Jupiter LXVIII Thelxinoe Thyone S/2003 J 2 Ananke Iocaste Hermippe Jupiter LXX
Carme group (30)	S/2022 J 1 S/2022 J 2 S/2016 J 3 Pasithee Jupiter LXIX S/2021 J 6 S/2003 J 24 Chaldene Jupiter LXIII Isonoe S/2021 J 4 Kallichore Erinome Kale Eirene Aitne Eukelade Arche Taygete Jupiter LXXII Carme Herse Jupiter LXI Jupiter LI S/2003 J 9 Jupiter LXVI Kalyke S/2018 J 3 S/2021 J 5 S/2003 J 10
Pasiphae group (18)	Philophrosyne Eurydome Jupiter LVI S/2003 J 4 S/2016 J 4 Jupiter LXVII Hegemone Pasiphae Sponde Megaclite Cyllene Sinope Jupiter LIX Aoede Autonoe Callirrhoe S/2003 J 23 Kore
See also	Rings of Jupiter Jupiter's moons in fiction
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