Rhea and Tethys April 20, 2012
Composite image of Saturn's moon Rhea (center) and Tethys (to the right) created from raw images taken by the Cassini spacecraft on April 20, 2012 from a distance of 1.9 million km from Rhea.
To make the image, a set of R,G, and B images was registered on Rhea RGN filter image, and a copy of the same R,G, and B images was registered on the Tethys GRN filter image. For each color set, masking was done on Tethys, and the combined was loaded into the appropriate color channel. HiPass filtered images of the GRN filtered image were used to enhance contrast. Colors and contrast was adjusted for the entire image. Thus the color and shading differences between the two moons are real and not an effect of differential processing.
Image credit: NASA / JPL / Space Science Institute / composite by Mike Malaska
Rhea and Tethys April 20, 2012
Composite image of Saturn's moon Rhea (center) and Tethys (to the right) created from raw images taken by the Cassini spacecraft on April 20, 2012 from a distance of 1.9 million km from Rhea.
To make the image, a set of R,G, and B images was registered on Rhea RGN filter image, and a copy of the same R,G, and B images was registered on the Tethys GRN filter image. For each color set, masking was done on Tethys, and the combined was loaded into the appropriate color channel. HiPass filtered images of the GRN filtered image were used to enhance contrast. Colors and contrast was adjusted for the entire image. Thus the color and shading differences between the two moons are real and not an effect of differential processing.
Image credit: NASA / JPL / Space Science Institute / composite by Mike Malaska