amateur image processing,
Saturn's small moons,
As Cassini approached Hyperion for a close encounter on August 25, 2011, it snapped a three-image mosaic of the sponge-like moon at a crescent phase. The mosaic did not quite cover the entire visible crescent, so a wide-angle image (with a resolution 10 times lower than the other images) was used to fill in a small area on the "nose."
NASA / JPL / SSI / mosaic by Emily Lakdawalla
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Original image data dated on or about August 25, 2011