| Kalyke | |
| Pronounced: | [1] |
| Adjective: | Kalykean |
| Named After: | Καλύκη Kalykē |
| Mpc Name: | Jupiter XXIII |
| Alt Names: | S/2000 J 2 |
| Discovery Ref: |   |
| Discoverer: | Scott S. Sheppard David C. Jewitt Yanga R. Fernandez Eugene A. Magnier |
| Discovered: | 23 November 2000 |
| Orbit Ref: |   |
| Epoch: | 27 April 2019 (JD 2458600.5) |
| Observation Arc: | 16.34 yr (5,967 days) |
| Eccentricity: | 0.3028225 |
| Period: | −766.61 d |
| Mean Motion: | / day |
| Inclination: | 165.93730° (to ecliptic) |
| Asc Node: | 132.43876° |
| Arg Peri: | 323.78885° |
| Magnitude: | 21.8 |
| Abs Magnitude: | 15.4 |
Kalyke, also known as , 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 2000, and given the temporary designation .[2] [3]
From infrared thermal measurements by the WISE spacecraft, Kalyke's albedo is measured at 2.9%, corresponding to a diameter of 6.9 kilometres. It orbits Jupiter at an average distance of 23,181,000 km in 766.61 days, at an inclination of 166° to the ecliptic (165° to Jupiter's equator), 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.[4]
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°. Kalyke is redder in color (B−V=0.94, V−R=0.70) than other moons of the Carme group, suggesting that it is a captured centaur or TNO, or a remnant of such an object that collided with the Carme group progenitor.[5]