| Discovery | |
|---|---|
| Discovered by | Scott S. Sheppard et al. |
| Discovery date | 2003 |
| Designations | |
Designation | Jupiter XLVIII |
| Pronunciation | /səˈliːniː/[1] |
Named after | Κυλλήνη Kyllēnē |
| S/2003 J 13 | |
| Adjectives | Cyllenean /sɪləˈniːən/[a] |
| Orbital characteristics[4] | |
| Epoch 2026-01-01 | |
| Periapsis | 13.9 million km |
| Apoapsis | 33.83 million km |
| 23.9 million km | |
| Eccentricity | 0.416 |
| −754.4 days | |
| Inclination | 144.5° |
| Satellite of | Jupiter |
| Group | Pasiphae group |
| Physical characteristics | |
| 2 km[5] | |
Spectral type | B–V = 0.73 ± 0.07, V–R = 0.46 ± 0.07[6] |
| 23.2 | |
Cyllene /səˈliːniː/, also known as Jupiter XLVIII, is an irregular satellite of Jupiter. It was discovered by a team of astronomers from the University of Hawaiʻi led by Scott S. Sheppard in 2003, receiving the temporary designation S/2003 J 13.[7][8] It gets as far as 33.8 million km from Jupiter.[4]
Cyllene is about 2 kilometres in diameter, and orbits Jupiter at an average distance of 23.9 million km in 754 days (2.0 years), at an inclination of 145° to the ecliptic, in a retrograde direction and with an eccentricity of 0.416.[4]
It was named in March 2005 after Cyllene, a naiad (stream nymph) or oread (mountain nymph) associated with Mount Cyllene, Greece.[9] 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 million km, and with inclinations ranging between 144.5° and 158.3°.
Notes
- ^ The adjective 'Cyllenean' is also used for Mercury,[2] though rarely, as for that referent the form is normally 'Cyllenian' /səˈliːniən/.[3]
References
- ^ 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.)
- ^ a b c Horizons output. "Jovian Osculating Orbital Elements for Cyllene (548)". Retrieved 2025-12-19.
- ^ S.S. Sheppard (2019), Moons of Jupiter, Carnegie Science, on line
- ^ Graykowski, Ariel; Jewitt, David (2018-04-05). "Colors and Shapes of the Irregular Planetary Satellites". The Astronomical Journal. 155 (4): 184. arXiv:1803.01907. doi:10.3847/1538-3881/aab49b. ISSN 1538-3881.
- ^ 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)
