Monday, 26 August 2019

Calcium Full Disk 25th August

It seems to have been a while since I imaged in calcium wavelengths, so on Sunday afternoon I decided to go for a full disk with the skywatcher ED80 stopped down to 60mm, coronado 2x cemax barlow and the Grasshopper camera with the homebrew calcium filter.  It was interesting to see the polar faculae are noticeably larger in size than plage bright points mid disk.  The polar faculae in calcium match up very well position wise with these features in the 2 disks prior to this post.