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Rhea's western wisps

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Rhea's western wisps
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Icy fractures on Saturn's moon Rhea reflect sunlight brightly in this high-resolution mosaic created from images captured by NASA's Cassini spacecraft during its flyby of Rhea on 2 March 2010 -- the closest yet of the moon.

This mosaic of six images shows the westernmost portion of the moon's 'wispy' terrain. Among the interesting features depicted here is a very straight east-west fracture near the top center of the mosaic that intersects two north-south fractures. The large crater at the bottom left of the mosaic is Inmar, 55 kilometres across.

The closest approach of the spacecraft to Rhea during this encounter was 100 kilometres. These images were obtained approximately half an hour later at an altitude of about 16,000 kilometres.

This mosaic shows part of the side of Rhea (1,528 kilometres across) that always faces Saturn. The images were reprojected in an orthographic projection centered on terrain at 7°N, 296°W. The mosaic itself shows terrain centered on terrain at 6°N, 293°W. North on Rhea is roughly up in the image.

The images were taken with the Cassini spacecraft's narrow-angle camera. The view was obtained at a Sun-Rhea-spacecraft, or phase, angle of 2 degrees. So, Cassini was almost directly between Rhea and the Sun as it acquired these images. Image scale is 85 metres per pixel.
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