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Although the boundaries may be somewhat vague, Saturn's moons can be divided into ten groups according to their orbital characteristics. Many of them, such as Pan and Daphnis , orbit within Saturn's ring system and have orbital periods only slightly longer than the planet's rotation period. [ 46 ]
The Moon's orbit is inclined by several degrees relative to Saturn's, so occultations will only occur when Saturn is near one of the points in the sky where the two planes intersect (both the length of Saturn's year and the 18.6-Earth-year nodal precession period of the Moon's orbit influence the periodicity).
Titan orbits Saturn at 20 Saturn radii or 1,200,000 km above Saturn's apparent surface. From Titan's surface, Saturn subtends an arc of 5.09 degrees, and if it were visible through the moon's thick atmosphere, it would appear 11.4 times larger in the sky, in diameter, than the Moon from Earth, which subtends 0.48° of arc.
Enceladus orbits within the densest part of Saturn's E ring, the outermost of its major rings, and is the main source of the ring's material composition. [45] Like most of Saturn's larger satellites, Enceladus rotates synchronously with its orbital period, keeping one face pointed toward Saturn.
The orbital period (also revolution period) ... or bodies with a similar density, e.g. Saturn's moons Iapetus with 1,088 kg/m 3 and Tethys with 984 kg/m 3 we get:
5.2 Co-orbital moons of Saturn. 5.3 Inner large moons of Saturn. 5.4 Alkyonides group of moons of Saturn. 5.5 Trojan moons of Saturn. 5.6 Outer large moons of Saturn.
Dione (/ d aɪ ˈ oʊ n i /), also designated Saturn IV, is the fourth-largest moon of Saturn.With a mean diameter of 1,123 km and a density of about 1.48 g/cm 3, Dione is composed of an icy mantle and crust overlying a silicate rocky core, with rock and water ice roughly equal in mass.
Prometheus / p r ə ˈ m iː θ iː ə s / is an inner satellite of Saturn. It was discovered on 24 October 1980 from images taken by the Voyager 1 probe, and was provisionally designated S/1980 S 27. [6] In late 1985 it was officially named after Prometheus, a Titan in Greek mythology. [7] It is also designated Saturn XVI. [8]