2018 June 3 Sun - AR12712
AR12712 is very close to the W limb, and remains a very complex group, with numerous flares. Number of sunspots is much reduced.
Large area of plages are on the following end.
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 3 Sun - AR12712
2018 June 3 Sun - AR12712
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- AR12712-06_11_27Z_cr.jpg (42.04 KiB) 已瀏覽 687 次
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- surface-05_34_34Z.jpg (149.9 KiB) 已瀏覽 687 次
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Re: 2018 June 3 Sun - AR12712
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- AR12712-05_52_41Z_cr.jpg (125.52 KiB) 已瀏覽 686 次
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- AR12712-05_53_08Z_cr.jpg (114.79 KiB) 已瀏覽 686 次
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- AR12712-05_54_12Z_cr.jpg (143.68 KiB) 已瀏覽 686 次
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- AR12712-05_54_45Z_cr.jpg (131.44 KiB) 已瀏覽 686 次
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- AR12712-05_55_06Z_cr.jpg (129.71 KiB) 已瀏覽 686 次
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- AR12712-05_55_22Z_cr.jpg (125.63 KiB) 已瀏覽 686 次
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- AR12712-06_00_23Z_cr.jpg (107.81 KiB) 已瀏覽 686 次
Re: 2018 June 3 Sun - AR12712
more images
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- AR12712-06_00_50Z_cr.jpg (95.24 KiB) 已瀏覽 686 次
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- AR12712-06_01_24Z_cr.jpg (128.02 KiB) 已瀏覽 686 次
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