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2015 Sept. 24 Sun -7th day of a huge filament

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發表於 2015-10-1 18:35:35 | 顯示全部樓層 |閱讀模式
Into the 7th day of its appearance, the huge filament is crossing the solar meridian.
Many knobs and barbs are visible in this filament.
AR12423, to the west of the filament, is showing some flares and minor filaments.

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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手機版|Archiver|香港天文學會  

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