2017 November 26 Sun - plage-filament evolves into AR12689
The plage-filament became more active on November 24, and developed into AR12689 on November 25.
Bright flares are observed, mostly to the E of the main sunspot where tiny spots are present.
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 26 Sun - plage-filament evolves into AR12689
2017 November 26 Sun - plage-filament evolves into AR12689
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最後由 PTS 於 週日 26 11月, 2017 23:16 編輯，總共編輯了 1 次。
Re: 2017 November 26 Sun - plage-filament evolves into AR12689
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![[Good Job]](./images/smilies/onion_d5f02ecd.gif "Good Job")
2017 November 26 Sun - AR12689
2017 November 26 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
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
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