Wikipedia
Helike ( ; Greek: Ελίκη), also known as , is a moon of Jupiter. It was discovered by a team of astronomers from the University of Hawaii led by Scott S. Sheppard in 2003, and given the temporary designation .
Helike is about 4 kilometres in diameter, and orbits Jupiter at an average distance of 20.54 million kilometres in 601.402 days, at an inclination of 155° to the ecliptic (156° to Jupiter's equator), in a retrograde direction and with an eccentricity of 0.1375. Its average orbital speed is 2.48 km/s.
It was named in March 2005 after Helike, one of the nymphs that nurtured Zeus (Jupiter) in his infancy on Crete.
Helike belongs to the Ananke group, retrograde irregular moons that orbit Jupiter between 19.3 and 22.7 million kilometres, at inclinations of roughly 150°.
Helike (; , pronounced , modern ) was an ancient Greek city that was submerged by a tsunami in the winter of 373 BC. It was located in Achaea, northern Peloponnesos, two kilometres (12 stadia) from the Corinthian Gulf and near the city of Boura, which, like Helike, was a member of the Achaean League. Modern research attributes the catastrophe to an earthquake and accompanying tsunami which destroyed and submerged the city. In an effort to protect the site from destruction, the World Monuments Fund included Helike in its 2004 and 2006 List of 100 Most Endangered Sites.
In Greek mythology, Helike (; , pronounced , modern ) was a name of several women. One was a nymph and one was a Queen of Chios.