Sunspot AR2738 imaged on 13/4/2019 from Lichfield – Daystar Calcium H Filter

I like this image – Calcium H filter – I used Astra Image software to do a little processing. This is a single image – my attempts at stacking went wrong……

What I really like is the white areas around the sunspot that are shown with a calcium filter are visible here.

I followed the advice of the team at the RAG mid-monthly meeting last night and came out reasonably early whilst sky still had reasonable seeing – image taken at 09:46.

See also the later post below also about today’s images – the analysis in the post below demonstrates that what I initially thought were dust bunnies on the image were in fact real!

Sunspot – Calcium H filter – from Lichfield – colourised and further processing – 13/4/2019



Above with PIPP and Astro Photo – below with GIMP2 – demonstrates that the image is also showing the central bar that is forming in the sunspot and which can be seen on the hydrogen alpha images on spaceweather such as

AR 2738 more detail !

Very surprised to getting even more solar action. A huge arc of plasma floated free way above the limb, this together with proms gave plenty to observe. The whole disc showed surface activity.

Using a green and polarising filter with the Herschel wedge at x65, the spot gave a really spiked edge. This came and went with the seeing , but settled, never noticed these spikes before. Again , a lovely day to set up and return , under clear skies ! Nick.