Sunday 17 March 2019

CaK Full Disk 17th March

Viewing the sun in Calcium wavelengths showed a number of areas of plage around the solar equator that mark where active regions from previous rotations.  These are the remnants of activity from solar cycle 24.  Taken with a 60mm scope at f15 with the homebrew CaK filter and a FLIR GH3 ICX814.