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It was believed that the cutoff for round objects is somewhere between 100 km and 200 km in radius if they have a large amount of ice in their makeup; [1] however, later studies revealed that icy satellites as large as Iapetus (1,470 kilometers in diameter) are not in hydrostatic equilibrium at this time, [2] and a 2019 assessment suggests that ...
Saturn has 146 known moons, 63 of which have formal names. [12] [11] It is estimated that there are another 100 ± 30 outer irregular moons larger than 3 km (2 mi) in diameter. [98] In addition, there is evidence of dozens to hundreds of moonlets with diameters of 40–500 meters in Saturn's rings, [99] which are not considered to be true moons.
Solar radius is a unit of distance used to express the size of stars in astronomy ... only known to about an accuracy of ± 100–200 km). ... Saturn: 0.0866 60,268 ...
Mimas, also designated Saturn I, is the seventh-largest natural satellite of Saturn.With a mean diameter of 396.4 kilometres or 246.3 miles, Mimas is the smallest astronomical body known to be roughly rounded in shape due to its own gravity.
After Phoebe, Ymir is the largest of the known retrograde irregular moons, with an estimated diameter of only 22 km. [1] Phoebe, at 213 ± 1.4 km in diameter, is by far the largest of Saturn's irregular satellites. [30] It has a retrograde orbit and rotates on its axis every 9.3 hours. [87]
Saturn – sixth planet from the Sun and the second-largest in the Solar System, after Jupiter. It is a gas giant with an average radius about nine times that of Earth . [ 1 ] [ 2 ] Although only one-eighth the average density of Earth, with its larger volume Saturn is just over 95 times more massive.
The Saturn-like feature could explain a climate shift at the time. ... (12 kilometers) in diameter, instead reached Earth’s Roche limit, which might have been about 9,800 miles ...
Enceladus is the sixth-largest moon of Saturn and the 18th-largest in the Solar System.It is about 500 kilometers (310 miles) in diameter, [5] about a tenth of that of Saturn's largest moon, Titan.