Jupiter's known moons
Metis
Adrastea
Amalthea
Thebe
Io
Galileans
Europa
Ganymede
Callisto
Themisto
Leda
Himalia
Lysithea
Elara
S/2000 J 11
Carpo
S/2003 J 12 1
Euporie
S/2003 J 3
S/2003 J 18
Thelxinoe
Euanthe
Helike
Orthosie
S/2003 J 16
Praxidike
Harpalyke
Hermippe
Thyone
Mneme
S/2003 J 17
Aitne
Kale
Taygete
S/2003 J 19
Chaldene
S/2003 J 15
S/2003 J 10
S/2003 J 23
Erinome
Aoede
Kallichore
Kalyke
Eurydome
S/2003 J 14
Pasithee
Cyllene
Eukelade
S/2003 J 4
Hegemone
Arche
Carme
S/2003 J 9
S/2003 J 5
Pasiphaë
Sinope
Sponde
Autonoe
Callirrhoe
Megaclite
S/2003 J 2
The most recent discoveries:
On October 6, 1999, the Spacewatch project discovered an asteroid, 1999 UX18. But it was soon realised that this was in fact a previously undiscovered moon of Jupiter, now called Callirrhoe. One year later, between November 23 and December 5, 2000, the team led by Scott S. Sheppard and David C. Jewitt of the University of Hawaii began a systematic search for small irregular moons of Jupiter. The other members of the team included, at various times, Yanga R. Fernández, Eugene A. Magnier, Scott Dahm, Aaron Evans, Henry H. Hsieh, Karen J. Meech, John L. Tonry, David J. Tholen (all from the University of Hawaii), Jan Kleyna (Cambridge University), Brett J. Gladman (University of Toronto), John J. Kavelaars (Hertzberg Institute of Astrophysics), Jean-Marc Petit (Observatoire de Besançon) and Rhiannon Lynne Allen (University of Michigan / University of British Columbia).
The team used the world's two largest CCD cameras, mounted on two of the thirteen telescopes atop Mauna Kea in Hawaii: the Subaru (8.3 m diameter) and the Canada-France-Hawaii (3.6 m). The 2000 observations revealed ten new moons, putting the count at 28 (Themisto had been rediscovered at the beginning of 2000).
The following year, on December 9-11, 2001, eleven other moons were discovered, bringing the total to 39. The year 2002 bore less fruit, netting only one moon, Arche. However, four months later, between February 5 and 9, 2003, 23 more moons were found, making for a complete sum of 63 moons.