Saturn has many moons (62 discovered as of 2012). The moons are: Titan, Rhea, Iapetus, Dione, Tethys, Enceladus, Mimas, Hyperion; Prometheus, Pandora (shepherd moons), Phoebe, Janus, Epimetheus, Helene, Telesto, Calypso, Atlas, Pan, Ymir, Paaliaq, Siarnaq, Tarvos, Kiviuq, Ijiraq, Thrymr, Skathi, Mundilfari, Erriapo, Albiorox, Suttung and 30 unnamed moons. Titan is the biggest moon; this moon has a thick nitrogen atmosphere.

The moons of Saturn in order of distance from Saturn:

Moon	Discovery Distance from the center of Saturn (km) Orbital period (Earth days)	Radius (km) Mass (kg)
Pan	Discovered: Mark R. Showalter/Voyager 2, 1990 Distance from Saturn: 133,583km Orbital period: 0.5750 day	Radius: 10 km Mass: unknown
Located within the Encke Gap in the rings
Atlas	Discovered: R. Terrile/Voyager 1, 1980 Distance from Saturn: 137,670km Orbital period: 0.6019 day	Radius: 18.5x17.2x13.5 km Mass: unknown
A shepherd satellite for Saturn's A-ring.
Prometheus	Discovered: S. A. Collins & D. Carlson/Voyager 1, 1980 Distance from Saturn: 139,353km Orbital period: 0.613 day	Radius: 74x50x34 km Mass: unknown
A shepherd satellite for the inner edge of Saturn's F Ring.
Pandora	Discovered: S. A. Collins & D. Carlson/Voyager 1, 1980 Distance from Saturn: 141,700km Orbital period: 0.6285 day	Radius: 55x44x31 km Mass: unknown
A shepherd satellite for the outer edge of Saturn's F Ring.
Epimetheus	Discovered: R. Walker/1966 and J. Fountain, S. Larson/1978 Distance from Saturn: 151,422km Orbital period: 0.694 day	Radius: 69x55x55 km Mass: 5.4 x 10 17kg
Covered by grooves, valleys, and craters over 30 km in diameter. Shares orbit with Janus (they are only separated by about 50 kilometers (31 miles)). Once every four years they approach each other, exchange some momentum and switch orbits.
Janus	Discovered: Audouin Dollfus, 1966 Distance from Saturn: 151,472km Orbital period: 0.694 day	Radius: 97x95x77 km Mass: 1.92 x 10 18kg
Heavily cratered (craters over 30 km in diameter). Shares orbit with Epimetheus (they are only separated by about 50 kilometers (31 miles)). Once every four years they approach each other, exchange some momentum and switch orbits.
Mimas	Discovered: William Herschel, 1789 Distance from Saturn: 185,520km Orbital period: 0.942 day	Radius: 209x196x191.4 km Mass: 3.75 x 10 19kg
Icy, heavily-cratered surface. Huge crater, Herschel, is 80 miles (130 km) wide. Herschel's central mountain is 4 miles (6 km) tall, about 2/3 the height of Mount Everest. Very low temperatures (-200° C = -328°F).
Enceladus	Discovered: William Herschel, 1789 Distance from Saturn: 238,020km Orbital period: 1.37 days	Radius: Radius: 256x247x244.6 km Mass: 7 x 10 19kg
Bright, smooth surface. Reflects almost all of the sunlight that hits it and is very cold ( -201° C = -330° F). 5 different types of terrain, suggesting a liquid interior: small craters, plains, fissures, corrugated terrain, and resurfaced areas.
Tethys	Discovered: G.D. Cassini, 1684 Distance from Saturn: 294,660km Orbital period: 1.89 days	Radius: 535.6x528x526 km Mass: 6.27 x 10 20kg
Icy surface with craters, many cracks and plains. One huge ice trench, the Ithaca Chasma, is 40 miles (65 km) wide and extends over 3/4 of the way around the moon. A water-ice interior composition (density =1.21 gm/cm3). Surface temperature is -187° C = -305° F.
Telesto	Discovered: B. Smith, H. Reitsema, S. Larson, J. Fountain, 1980 Distance from Saturn: 294,660km (leads Tethys) Orbital period: 1.89 days	Radius: 15x12.5x7.5 km Mass: unknown
Shares an orbit with Calypso; these 2 moons are also called the Tethys Trojans because they orbit Saturn in Tethys orbit, Telesto is 60° ahead of Tethys, Calypso is 60° behind Tethys.
Calypso	Discovered: B. Smith, H. Reitsema, S. Larson, J. Fountain, 1980 Distance from Saturn: 294,660km (trails Tethys) Orbital period: 1.89 days	Radius: 15.0x8.0x8.0 km Mass: unknown
Shares an orbit with Calypso; these 2 moons are also called the Tethys Trojans because they orbit Saturn in Tethys' orbit, Telesto is 60° ahead of Tethys, Calypso is 60° behind Tethys.
Dione	Discovered: G.D. Cassini, 1684 Distance from Saturn: 377,400 km Orbital period: 2.74 days	Radius: 560 km Mass: 1.10 x 10 21kg
Icy surface with craters, plains and streaks of bright material. Some craters over 100 km wide. Its density is 1.43 gm/cm3, the densest moon of Saturn, indicating a large rocky core.
Helene	Discovered: P. Laques & J. Lecacheus, 1980 Distance from Saturn: 377,400 km (leads Dione) Orbital period: 2.74 days	Radius: 18x16x15 km Mass: unknown
Shares orbit with Dione, leads it by 60°.
Rhea	Discovered: G.D. Cassini,1672 Distance from Saturn: 527,040 km Orbital period: 4.52 days	Radius: 764 km Mass: 2.31 x 1021kg
Icy surface with craters, plains and bright streaks. No atmosphere. Its density is 1.33 gm/cm3, indicating a small, rocky core covered with water-ice.
Titan	Discovered: C. Huygens, 1655 Distance from Saturn: 1,221,830 km Orbital period: 15.9 days	Radius: 2,575 km Mass: 1.3455 x 10 23kg
Biggest moon of Saturn and second largest moon in Solar System (after Jupiter's Ganymede). It is larger than the planets Mercury and Pluto. Titan has a thick mostly nitrogen atmosphere (with some methane) and an atmospheric pressure of 1.6 bars (60 percent greater than the Earth's). This atmosphere with its heavy clouds obscures the moon's surface. It may rain liquid methane. The surface temperature is about -178°C = -289°F.
Hyperion	Discovered: W. & G. Bond/W. Lassell, 1848 Distance from Saturn: 1,481,100 km Orbital period: 21.27 days	Radius: 180x140x112.5 km Mass: 2 x 10 19kg
Hyperion is the largest-known irregular-shaped body. It has a reddish color. Surface marred with craters. Variable rotational period.
Iapetus	Discovered: G.D. Cassini,1671 Distance from Saturn: 3,561,300 km Orbital period: 79.33 days	Radius: 718 km Mass: 1.6 x 10 21kg
A rocky moon that is partly bright and partly reddish in color. Craters on surface.
Phoebe	Discovered: W. Pickering, 1898 Distance from Saturn: 12,952,000 km Orbital period: 550.48 days (retrograde orbit)	Radius: 110 km Mass: 4 x 10 18kg
Almost circular shape, reddish color. Orbits in a retrograde direction (opposite in direction to other satellites' orbits). Rotates on its axis every 9 hours (this is unlike the other moons of Saturn, except Hyperion, which always show the same face to Saturn). Phoebe may be a captured asteroid.
Moon	Discovery Distance from the center of Saturn (km) Orbital period (Earth days)	Radius (km) Mass (kg)

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