A team of researchers has obtained new estimates on the age of Saturn's irregular satellites, which range from 4.1 and 4,4 billion years.
Saturn’s largest moons. Credit: NASA/JPL-Caltech/Emily Lakdawalla, Ted Stryk, Gordan Ugarkovic, & Jason Perry
Unfortunately, these and other previous simulations suffered from poor resolutions for the last 3.5 billion years because of a limited number of planetesimals in their simulations. This prevented them from obtaining accurate ages of satellites with low crater densities , and the ages derived showed significant variation based on the two different sizes of TNOs. As they note in their paper:
This composite image, taken by the NASA/ESA Hubble Space Telescope on 6 June 2018, shows the ringed planet Saturn with six of its 62 known moons. Credit: NASA/ESA
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