2018 June 16 Sun - AR12713
AR12713 showed up on June 11 but I can only observe this afternoon.
At the leading part are 2 sunspots amid a patch of bright plages, ans several smaller sunpots follows and come with some flares. An intense forest of filaments complete 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 16 Sun - AR12713
2018 June 16 Sun - AR12713
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Re: 2018 June 16 Sun - AR12713
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Re: 2018 June 16 Sun - AR12713
more images
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- AR12713-05_54_43Z_cr.jpg (85.24 KiB) 已瀏覽 666 次
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