2018 June 2 Sun - AR12712
As AR12712 moves towards the W limb, it maintains a very complex group, with tens of sunspots. Flares are more numerous and of higher intensity.
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 2 Sun - AR12712
2018 June 2 Sun - AR12712
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Re: 2018 June 2 Sun - AR12712
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- AR12712-02_00_24Z_cr.jpg (149.46 KiB) 已瀏覽 722 次
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- AR12712-02_01_41Z_cr.jpg (137.81 KiB) 已瀏覽 722 次
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- AR12712-02_02_27Z_cr.jpg (116.53 KiB) 已瀏覽 722 次
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- AR12712-02_17_48Z_cr.jpg (144.03 KiB) 已瀏覽 722 次
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- AR12712-02_18_05Z_cr.jpg (162.75 KiB) 已瀏覽 722 次
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- AR12712-02_18_30Z_cr.jpg (145.6 KiB) 已瀏覽 722 次
Re: 2018 June 2 Sun - AR12712
more images
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- AR12712-02_18_46Z_cr.jpg (143.55 KiB) 已瀏覽 722 次
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- AR12712-02_19_25Z_cr.jpg (135.13 KiB) 已瀏覽 722 次
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