Cyllene (moon)
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.
| Discovery | |
|---|---|
| Discovered by | Scott S. Sheppard et al. |
| Discovery date | 2003 |
| Designations | |
Designation | Jupiter XLVIII |
| Pronunciation | /səˈliːniː/ |
Named after | Κυλλήνη Kyllēnē |
Alternative names | S/2003 J 13 |
| Adjectives | Cyllenean /sɪləˈniːən/ |
| Orbital characteristics | |
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 |
| 23.2 | |
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. 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°.