2018 April 23 Sun - AR12707

各類觀測太陽的儀器介紹及太陽攝影 Solarmax
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2018 April 23 Sun - AR12707

文章 PTS » 週一 23 4月, 2018 15:35

2018 April 23 Sun - AR12707

AR12707 never produce visible sunspots, and is now reduced to plages and filaments. It is located SW of AR12706.

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.
附加檔案
surface-02_11_31Z.jpg
surface-02_11_31Z.jpg (159.29 KiB) 已瀏覽 145 次
surface-02_12_34Z.jpg
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AR12707-03_17_28Z_cr.jpg
cropped to 700 x 700 pixels
AR12707-03_17_28Z_cr.jpg (46.14 KiB) 已瀏覽 145 次
AR12707-03_17_32Z_cr.jpg
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AR12707-03_22_12Z_cr.jpg
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AR12707-03_22_17Z_cr.jpg
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AR12707-03_22_52Z_cr.jpg
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AR12707-03_30_46Z_cr.jpg
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AR12707-03_40_17Z_cr.jpg
AR12707-03_40_17Z_cr.jpg (42.24 KiB) 已瀏覽 145 次

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