Wednesday, 11 March 2015

AR12297 In CaK Light 10th March

The sun was low and the conditions weren't ideal when I took this image, but it shows well the scale of this very active region.  Interestingly the sinuous filament below the large spot can be seen in this image taken with the ED60 at 960mm focal length with the homebrew CaK filter and the DMK31 camera.