2018 May 28 Sun - AR12711
AR12711 has mostly turned to the back side, leaving a strip of flare and some filament right on the W limb. No sunspot is visible.
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 28 Sun - AR12711
2018 May 28 Sun - AR12711
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- white-01_50_00Z.jpg (131.27 KiB) 已瀏覽 435 次
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- AR12711-03_22_09Z_cr.jpg (35.85 KiB) 已瀏覽 435 次
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Re: 2018 May 28 Sun - AR12711
more images
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- AR12711-02_41_03Z_cr.jpg (39.76 KiB) 已瀏覽 434 次
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- AR12711-02_41_29Z_cr.jpg (44.44 KiB) 已瀏覽 434 次
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- AR12711-02_41_38Z_cr.jpg (47.25 KiB) 已瀏覽 434 次
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- AR12711-02_42_55Z_cr.jpg (45.6 KiB) 已瀏覽 434 次
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- AR12711-02_55_13Z_cr.jpg (45.65 KiB) 已瀏覽 434 次
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- AR12711-02_55_36Z_cr.jpg (48.14 KiB) 已瀏覽 434 次
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- AR12711-02_55_56Z_cr.jpg (43.57 KiB) 已瀏覽 434 次
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- AR12711-03_02_59Z_cr.jpg (44.41 KiB) 已瀏覽 434 次
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- AR12711-03_03_16Z_cr.jpg (48.54 KiB) 已瀏覽 434 次
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- AR12711-03_09_24Z_cr.jpg (42.76 KiB) 已瀏覽 434 次
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