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The seeing was again good on the 11th January 2012 for this image of Jupiter with three of its Galilean satellites. Io is at upper left, Ganymede at lower right and Europa above. The fourth, Callisto, was out of the frame on the left.
The image was made using an Imaging Source DMK mono camera with a colour filter wheel on the Meade LX200R 14" telescope. For each filter (red, green and blue) a sequence of approximately 30 seconds of video was taken at 15 frames per second . The video sequences were processed in Registax, Maxim DL and Photoshop. In a change from previous images this one was processed using the red-filtered image as a luminance channel to create what is usually known as an R-RGB image. This has brought out much more detail than using RGB alone. [Jefferis]