Tuesday, 6 April 2021

AR12813 in Ha & CaK - 4th April

New-AR-Ha-120-colour New-AR-Cak-120-colour Seeing was unusually good firth thing on the morning of the 4th of April and I was able to catch this small active region in both Ha and CaK at 120mm f26 using a Daystar Quark, homebrew CaK filter and the PGR Grasshopper IMX174 camera.
Posted by BrierleyHillSolar at Tuesday, April 06, 2021