Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Kalyke, also known as Jupiter XXIII, 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 2. Kalyke is about 5.2 kilometres in diameter, and orbits Jupiter at an average distance of 23,181 Mm in 721.021 days, at an inclination of 166° to the ecliptic, in a retrograde direction and with an eccentricity of 0.2140. It was named in October 2002 after the Greek mythological figure Kalyke or Calyce.