Dawn on the northern face of Saturn's rings
Posted by Emily Lakdawalla
2009/08/20 02:51 CDT
I've been watching Cassini's raw images website for the latest eye candy from Saturn's equinox. Here is a particularly nice view of a crescent Saturn with dark rings, just a week after equinox. I love the skinny shadow cast by the vast ring system, and the way the rings are brightened by reflected Saturnshine. The image is composed of red, green, and blue frames so has some relationship natural color, but because Saturn is so much brighter than the rings the color doesn't work particularly well.This set of images is even cooler, but overexposure of Saturn makes the color even more difficult. Still, it was well worth fiddling with because of the great fat shadow cast by Titan on the planet. Now that we're after equinox, Titan's shadow is falling to the south of the rings' shadow. To top things off, there's a skinny little crescent Tethys at the bottom left of the image. This one is also composed of red, green, and blue frames. Because everything in the Saturn system -- Titan shadow, Tethys, and Cassini -- was moving in the time separating the frames, when I matched up the three frames of Saturn and its rings, the Titan shadow and Tethys were misregistered; so I fudged things by cutting and shifting shadow and Tethys until they were aligned. Enjoy!
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