3-day evolution of a filament near NE limb - 2018 May 17
The filament started as a short dark patch which is surrounded by scattered plages.
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.
3-day evolution of a filament near NE limb - 2018 May 17
3-day evolution of a filament near NE limb - 2018 May 17
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- filament-NE-01_52_35Z.jpg (213.93 KiB) 已瀏覽 364 次
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- filament-NE-01_53_03Z.jpg (159.45 KiB) 已瀏覽 364 次
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- filament-NE-01_53_27Z.jpg (158.51 KiB) 已瀏覽 364 次
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- filament-NE-01_53_49Z.jpg (183.13 KiB) 已瀏覽 364 次
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- filament-NE-02_06_24Z.jpg (189.56 KiB) 已瀏覽 364 次
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- filament-NE-02_06_55Z.jpg (158.07 KiB) 已瀏覽 364 次
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- filament-NE-02_23_21Z.jpg (147.92 KiB) 已瀏覽 364 次
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- filament-NE-02_23_39Z.jpg (157.68 KiB) 已瀏覽 364 次
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- filament-NE-02_30_59Z.jpg (160.94 KiB) 已瀏覽 364 次
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- filament-NE-02_31_33Z.jpg (199.12 KiB) 已瀏覽 364 次
Re: 3-day evolution of a filament near NE limb - 2018 May 17
more images
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- filament-NE-02_43_54Z.jpg (181.86 KiB) 已瀏覽 363 次
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- filament-NE-02_44_19Z.jpg (165.97 KiB) 已瀏覽 363 次
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