2017 November 28 Sun - AR12689
The sunspot consists of split umbrae, and several flares show up to the east of the sunspot. A filament cuts across the flare. Further east, a broad stream of plasma is observed in the NE direction.
Telescope: AP Starfire EDT 155 mm f/9.
stopped to 50 mm (f/28) for disc images, with 4X telecentric lens (f/36) for closeups
filter: Solar Spectrum SO1.5/0.3A with CERF prefilter
Camera: Imperx 4M15
2017 November 28 Sun - AR12689
2017 November 28 Sun - AR12689
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