AR12628 first appears as a tiny flare on the NE limb on Jan 19. It has evolved into a large group with a large leading spot and many following sunspots.
Here are images from Jan 23.
Telescope: AP Starfire EDT 155 mm f/9.
stopped to 50 mm for disc images, with 4X telecentric lens (f/36) for closeups
filter: Solar Spectrum SO1.5/0.3A with CERF prefilter
Camera: Imperx 4M15
North is up, and east to the left.
發表於 2017-1-30 22:03:03