Erinome

Erinome

Discovery
Discovered by	Scott Sheppard et al.
Discovery date	2000
Designations
Designation	Jupiter XXV
Pronunciation	(see text)
Named after	Erinoma (Greek form unknown)
Alternative names	S/2000 J 4
Orbital characteristics
Semi-major axis	23279000 km
Eccentricity	0.266
Orbital period (sidereal)	−728.3 days
Mean anomaly	131.1°
Inclination	164.9°
Longitude of ascending node	321.7°
Argument of perihelion	356.0°
Satellite of	Jupiter
Group	Carme group
Physical characteristics
Mean diameter	3 km
Apparent magnitude	22.8

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 et al. in 2000, and given the temporary designation S/2000 J 4.

Erinome is about 3.2 kilometres in diameter, and orbits Jupiter at an average distance of 22,986,000 km in 711.965 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°.

Name

Erinome was named in October 2002 after the mythological Erinoma, a Cypriot woman said by the discovery group to be a "daughter of Celes, compelled by Venus to fall in love with Jupiter." (However, it was Jupiter whom Venus made fall in love with Erinoma, in order to ruin her.)

The final -a vowel of the name was changed to -e to accord with IAU naming conventions for retrograde moons. The story is only known in Latin, and manuscripts have the name as Erinoma, Erinona and Erittoma. The original Greek name, and thus the stressed syllable in Latin, is unknown. It might be a late corruption of Eurynome, in which case the stress would be on the second syllable (/ɛˈrɪnəmiː/?). Since As of 2020 there is no moon named 'Eurynome', this would not be ambiguous.