IRIS: crop, offset, 3 star registration to remove sky rotation, then registration on comets nucleus, logarithmic scaling, selective gaussian filter, 2 x soft-binning
Gimp: some level adjustment
Remark
Heavy ground level fog with visibility below 50m! It took me more then half an hour to find a location on a small hill 30m above the surrounding environment to come out of the fog. After searching the "hole in the fog", setting up the equipment and spending further 15 minutes to locate Bradfield with my 7x50 field-glasses I found myself near end of the nautical twilight and the sky was already very bright! There is a second image from Bradfield to give an impression how bright the sky already was while taking the images.
