The Sun in Ca-K - 5th Apr 2020

[David Smith]

Disappointed to see AR12759 has vanished from white light still something to see in Ca-K though. Not great conditions today to be honest, crossed winds, some high level cloud and a blowing a hoolie at times at ground level. Seeing was extremely variable too. The Evostar didn't last long in the wind but I did manage to get something from it before the wind forced a change of track.

Full disk in Ca-K, the usual double exposure for proms and surface detail composited in GIMP.

 

And the few shots from a frustrating session with the big Evostar "sail".

Plage area and prominence @1000mm native focal length

And a somewhat ambitious attempt to image the plage area @2500mm

 

 

[Davey-T]

Thanks for the Ca-K views David, just been trying a close up in Ha but it's a job to spot the AR in the rest of the wobbly mass. Stu said he can see small spots in WL.

Going to have another go with the focal reducer as seeing isn't great and a frisky breeze isn't helping.

Dave

[Pete Presland]

Nice looking Ca-K images