A close look at the beautiful Oiii supernova reminant in the Cygnus region, surrounded by LBN325 and LBN326 Ha structures.
The image is composed of two-panels mosaic combined in the duotone HOO palette. The processing resulted to be very challenging due to the very different intensities and structures between the Ha and Oiii emissions, especially the very faint Oiii (blue) compared to strong Ha (red).
Total integration time is 18hrs (4.5hrs Ha and Oiii each panel).
High resolution here