2017 September 10 Sun - prominences
Several prominence groups appear on the solar limb. The long one on the SE limb is very faint but the filaments are very fine.
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 September 10 Sun - prominences
2017 September 10 Sun - prominences
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Re: 2017 September 10 Sun - prominences
Lots of activities!
誰在線上
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