Cassini Observes Prometheus Anew
08 May 2007


Credit: NASA/JPL/Space Science Institute

NASA recently published a stunning image of Saturn's magnificent rings, acquired by the Saturn-bound Cassini spacecraft. The image shows the perturbing effects of Prometheus, the shepherd moon of the F ring.

In this image, Prometheus glides by two dark gores in the ring's inner edge. The moon's gravity severely distorts the shape of the ring.

Prometheus (102 km across) is partially-illuminated by sunlight reflected off Saturn.

Cassini was looking down on the dark side of the rings from about 54° above the ringplane.

The image was taken in visible light with Cassini's narrow-angle camera on 17 March 2007. Cassini was approximately 1.8 million km from Prometheus. Image scale is 11 km per pixel.

Further Reading

Cassini Encounters Prometheus


Three Tiny Moons Align

Aymen Mohamed Ibrahem

Senior Astronomy Specialist

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