2018 June 20 Sun - AR12714
AR12714 first appeared as a small flare on June 16, and developed into an active region on June 18.
The main following sunspot of this AR has a split umbrae, and the leading batch of tiny sunspots are on the lead. Flares mainly originate from this leading sunspots.
As the slow motion is still unavailable, I have to continue with push or pull the telescope to put the image in field. This task becomes very tedious when working on close-up imaging, and I have to use very short exposures (thus high gain) to avoid blur images.
Telescope: AP Starfire EDT 155 mm f/9.
stopped to 80 mm (f/17.5) for disc images, with 4X telecentric lens (f/36) for closeups
filter: Solar Spectrum SO1.5/0.3A with CERF prefilter
Camera: ASI1600MM, 4656X3520 pixels (3.8 micron), binned 2
North is up, east is to the left.
2018 June 20 Sun - AR12714
2018 June 20 Sun - AR12714
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- white-01_24_17Z.jpg (110.89 KiB) 已瀏覽 681 次
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- AR12714-03_04_19Z_cr.jpg (40.3 KiB) 已瀏覽 681 次
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- AR12714-02_20_11Z_cr.jpg (45.8 KiB) 已瀏覽 681 次
最後由 PTS 於 週三 20 6月, 2018 22:55 編輯,總共編輯了 1 次。
Re: 2018 June 16 Sun - AR12714
more images
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