2018 June 28 Sun - AR12715
AR12715 is right on the W limb. There is no visible sunspots.
One or two small flares appear among the filaments and plages.
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 28 Sun - AR12715
2018 June 28 Sun - AR12715
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- white-01_37_32Z.jpg (101.97 KiB) 已瀏覽 930 次
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- AR12715-03_01_06Z_cr.jpg (24.04 KiB) 已瀏覽 930 次
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Re: 2018 June 28 Sun - AR12715
more images
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- AR12715-02_11_45Z_cr.jpg (34.3 KiB) 已瀏覽 929 次
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- AR12715-02_13_04Z_cr.jpg (29.84 KiB) 已瀏覽 929 次
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- AR12715-02_24_40Z_cr.jpg (32.1 KiB) 已瀏覽 929 次
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- AR12715-02_26_13Z_cr.jpg (28.31 KiB) 已瀏覽 929 次
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- AR12715-02_46_06Z_cr.jpg (26 KiB) 已瀏覽 929 次
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- AR12715-02_46_31Z_cr.jpg (27.88 KiB) 已瀏覽 929 次
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