AR12628 - 9 day evolution-2 (2017 Jan 21)
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.An eruption from the following spots produces a dark filament that shoots to the SE.
Here are images from Jan 21.
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.
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