Monday, 3 August 2020

AR12768 & AR12769 in CaK 2nd August

ar12768-CaK-colour
I was very lucky to catch excellent seeing first thing on Sunday morning before the clouds rolled in.  Both these active regions have very small sunspots which suggests a relatively low magnetic field strength, however, we are only just at the start of cycle 25.  Taken with the 100mm Tal refractor at f27 with the Airylab 2.7x telecentric and the FLIR IMX174 camera.  There is lots of fine detail in these images when viewed full size!