Saturn has 18 named satellites plus 13 recently discovered and as yet unnamed ones.
From those 13, 12 were discovered in 2000 and the 13th was discovered on February 5th, 2003, by Scott S. Sheppard and David C. Jewitt, from the Institute for Astronomy, University of Hawaii along with Jan Kleyna of Cambridge University. The satellite was announced formally by the International Astronomical Union on April 8, 2003, and it was called S/2003 S1.