2017 November 16 Sun - AR12687
The Sun has been spotless since November 3, when AR12686 turned to the backside.
On November 14, AR12687 appear on the E limb with some strong flares. This group is complex, with 2 small sunspot leading, and a large sunspot and several small ones following. The main sunspot has 3 elongated split umbrae.
An N-S elongated bright flare appears to just on the W of the main sunspot. A complex filament-structure shows up to the west.
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 16 Sun - AR12687
2017 November 16 Sun - AR12687
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Re: 2017 November 16 Sun - AR12687
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