The inner edge of the Cassini Division is called the Huygens Gap. The shadow of Saturn on the rings, which stretched across all of the rings earlier in Cassini’s mission, now barely makes it past the Cassini division. Thanks to Cassini, we know that some of the gaps within the rings are carved and shepherded by small moons; others are formed by gravitational interactions with larger moons, such as Mimas. More information: Kévin Baillié et al. This newly released image form the Cassini Spacecraft shows Saturn and Mimas. Mimas is the cause of the inner boundary of the Cassini division. The Cassini division is caused by the pull of one of Saturn's moons called Mimas. The researchers suspected a link between Mimas, one of Saturn’s moons, and the band, since there is a region at the inner edge of the Division where the particles orbit around Saturn exactly twice as fast as Mimas. Formation of the Cassini Division – I. This is unstable, and causes the particle to experience a gravitational tug every other orbit, eventually kicking it out of that orbit. Any particle orbiting at the inner edge of the Cassini division would have an orbital period exactly half that of Mimas, forming a 2:1 resonance. According to the researchers' calculations, the Cassini Division is likely to take around 40 million years to … A ring particle in the Cassini division would go around Saturn twice for every time Mimas goes around once; this is called a "2:1 resonance orbit". Observations from Cassini revealed that there is still some ring material in the Cassini Division, although it is sparse enough that the area appears dark from a distance.
The changing length of the shadow marks the passing of the seasons on Saturn. Shaping the rings by Mimas inward migration, Monthly Notices of the Royal Astronomical Society (2019). The 2,980-mile (4,800-kilometre) wide division is thought to be caused by the moon Mimas. The Cassini Division is a wide, dark band located between Saturn’s two most visible rings, in which the particle density is considerably lower than that inside the rings. Today, Mimas has begun to migrate outwards again.
Mimas apparently cleared enough material to create the 4,800-kilometer (2,980-mile) wide gap (called the Cassini Division) between Saturn's two widest rings, the A and B rings. It shows the Cassini Division, a distance between two of Saturn's rings almost as wide as the planet Mercury.
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