2018 May 6 Sun - AR12708
AR12708 first appeared near the E limb as a small flare on May 3, and its activity intensified on May 3, with bright flares.
Observation was severely interrupted by clouds, and I could capture just a few images.
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 6 Sun - AR12708
2018 May 6 Sun - AR12708
- 附加檔案
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- Hope you can see the tiny sunspots
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- prominence-03_52_44Z.jpg (67.4 KiB) 已瀏覽 330 次
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- surface-03_53_40Z.jpg (172.65 KiB) 已瀏覽 330 次
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- AR12708-04_22_31Z.jpg (210.6 KiB) 已瀏覽 330 次
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- AR12708-04_22_37Z.jpg (234.84 KiB) 已瀏覽 330 次
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- AR12708-04_22_38Z.jpg (232.15 KiB) 已瀏覽 330 次
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- AR12708-04_31_49Z.jpg (200.69 KiB) 已瀏覽 330 次
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