Friday, 12 July 2019

CaK Full Disk 5th July

It was nice to do some CaK imaging on 5th of july as this seems to be a wavelength i've been neglecting of late.  With all the tell tale signs of cycle 25 activity being visible at times this wavelength is excellent at picking up on these features.  The seeing was reasonably good last friday morning, so I did a full disk with the 100mm Tal100R refractor at prime focus, f10 with the home brew CaK filter.  The camera used was the FLIR Grasshopper 3 ICX916M.  Lots of detail is visible in the full size image.