Erinome
Erinome, also known as Jupiter XXV, is a retrograde irregular satellite of Jupiter. It was discovered by a team of astronomers from the University of Hawaii led by Scott S. Sheppard in 2000, and given the temporary designation S/2000 J 4.
Erinome imaged by the Canada-France-Hawaii Telescope in December 2001 | |
| Discovery | |
|---|---|
| Discovered by | Scott S. Sheppard David C. Jewitt Yanga R. Fernandez Eugene A. Magnier |
| Discovery site | Mauna Kea Observatory |
| Discovery date | 23 November 2000 |
| Designations | |
Designation | Jupiter XXV |
Named after | Erinoma (Greek form unknown) |
Alternative names | S/2000 J 4 |
| Orbital characteristics | |
| Epoch 17 December 2020 (JD 2459200.5) | |
| Observation arc | 16.34 yr (5,967 days) |
Semi-major axis | 0.1494286 AU (22,354,200 km) |
| Eccentricity | 0.2052559 |
Orbital period (sidereal) | –682.80 d |
Mean anomaly | 98.99686° |
Mean motion | 0° 31m 38.062s / day |
| Inclination | 164.81976° (to ecliptic) |
Longitude of ascending node | 34.02660° |
| 81.11760° | |
| Satellite of | Jupiter |
| Group | Carme group |
| Physical characteristics | |
Mean diameter | 3 km |
| Albedo | 0.04 (assumed) |
| 22.8 | |
| 16.0 | |
Erinome is about 3 kilometres in diameter, and orbits Jupiter at an average distance of 22,986,000 km in 682.80 days, at an inclination of 164° to the ecliptic (162° to Jupiter's equator), in a retrograde direction and with an eccentricity of 0.2552.
It belongs to the Carme group, made up of irregular retrograde moons orbiting Jupiter at a distance ranging between 23 and 24 Gm and at an inclination of about 165°.
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