Eirene (moon)

Eirene Template:IPAc-en, also Jupiter LVII and originally known as Template:Nowrap, 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 2003<ref>IAUC 8087: Satellites of Jupiter 2003 March 4 (discovery)</ref><ref>MPEC 2003-E11: S/2003 J 1, 2003 J 2, 2003 J 3, 2003 J 4, 2003 J 5, 2003 J 6, 2003 J 7 2003 March 4 (discovery and ephemeris)</ref> but was then lost.<ref>Template:Cite web</ref><ref name=Jacobson>Template:Cite journal</ref><ref>Template:Cite journal</ref><ref>Template:Cite web</ref> It was recovered in 2017 and given its permanent designation that year.<ref>Template:Cite web</ref>

Characteristics

Eirene is about 4 kilometres in diameter, and orbits Jupiter at an average distance of 23,974,000 km in 743.88 days, at an inclination of 166° to the ecliptic (167° to Jupiter's equator), in a retrograde direction and with an eccentricity of 0.307.

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

The moon was named in 2019 after Eirene (Εἰρήνη), the daughter of Zeus and Themis and the goddess of peace in Greek mythology; the name originated from a naming contest held on Twitter with sixteen tweets suggesting the name, most significantly by users Quadrupoltensor (@Quadrupoltensor) who first suggested the name and PaulR (@PJRYYC).<ref name=name>Template:Cite web</ref><ref>Template:Cite web</ref><ref>Template:Cite web</ref>