2018 May 25 Sun - AR12711
AR12711 has developed into a very active group, with many sunspots. Flares show up around the following sunspot, while filaments comes from both the larger leading sunspot and around the flares.
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 May 25 Sun - AR12711
2018 May 25 Sun - AR12711
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Re: 2018 May 25 Sun - AR12711
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- AR12711-01_53_35Z_cr.jpg (132.44 KiB) 已瀏覽 367 次
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Re: 2018 May 25 Sun - AR12711
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- AR12711-02_34_40Z_cr.jpg (147.78 KiB) 已瀏覽 367 次
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- AR12711-02_35_00Z_cr.jpg (146.19 KiB) 已瀏覽 367 次
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- AR12711-02_35_07Z_cr.jpg (146.33 KiB) 已瀏覽 367 次
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