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2015 Sept. 20 Sun - 3rd day of a huge prominence

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發表於 2015-10-1 18:19:25 | 顯示全部樓層 |閱讀模式
2 days later, the huge prominence has turned into a huge dark filament.
Many featurea are visible, especially the barks that are anchored on the disc.

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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