Prometheus (not a movie)

In this image from the Cassini mission archive, you can see not only Saturn himself and his magnificent ring system, but also one of the giant's moons. It is located at the bottom of the frame at the limb of the planet. It's about Prometheus.
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Prometheus has an irregular shape. Its dimensions are 135 by 79 by 59 km. The average density of the satellite is only 0.48 ± 0.09 g / cm3. This is much less than the density of water ice. It is assumed that Prometheus is a very porous body.
Prometheus (not a film) rings, image, satellite, you can see, Prometheus, similar, Thanks to, internal, himself, passes, small, Orbit, activity, responsible, degree, favors, considerable, Saturn

In the first color photo, the satellite appears particularly bright, because at the time of the shooting Saturn was illuminated, unlike its ring system. If you look closely, then on the image you can see a thin strip passing near Prometheus. This ring F - the narrowest, but the most active of the rings of Saturn.
Prometheus (not a film) rings, image, satellite, you can see, Prometheus, similar, Thanks to, internal, himself, passes, small, Orbit, activity, responsible, degree, favors, considerable, Saturn

Prometheus is largely responsible for the activity of ring F. The orbit of a small moon passes along its very inner edge. Due to such proximity, the satellite acts as a kind of “shepherd” of the ring F. Its gravity helps to keep its particles together, preventing them from flying apart.In addition, the gravitational field of Prometheus affects the structure of the ring F itself, from time to time creating fractures, loops and other similar structures in it.

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