Eirene, also Jupiter LVII and originally known as S/2003 J 5, 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
but was then lost. It was... Wikipedia
Orbital period: 739 days
Discovered: 2003
Discoverers: Scott S. Sheppard and David C. Jewitt
Mean diameter: 4 km
Orbits: Jupiter
Absolute magnitude (H): 15.8
Alternative names: S/2003 J 5