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2016 July 27 Sun

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發表於 2016-7-27 20:44:30 | 顯示全部樓層 |閱讀模式
When all the AR's have turned to the far side, the solar surface is relatively calm, except for the tiny un-numbered active region to the SE, and an extremely long filament to the NE.

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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