3-day evolution of a filament near NE limb - 2018 May 18
On May 18, the filament has grown to at least 5-fold in length, running in the NE-SW direction, and a fainter entension from the SW end which runs SE. The plages are scattered on much larger arena.
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 18
3-day evolution of a filament near NE limb - 2018 May 18
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- filament-NE-02_14_36Z.jpg (195.38 KiB) 已瀏覽 343 次
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- filament-NE-02_14_57Z.jpg (153.65 KiB) 已瀏覽 343 次
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- filament-NE-02_15_14Z.jpg (172.59 KiB) 已瀏覽 343 次
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- filament-NE-02_24_34Z.jpg (215.99 KiB) 已瀏覽 343 次
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- filament-NE-02_25_07Z.jpg (185.25 KiB) 已瀏覽 343 次
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- filament-NE-02_26_17Z.jpg (175.3 KiB) 已瀏覽 343 次
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- filament-NE-02_39_45Z.jpg (233.01 KiB) 已瀏覽 343 次
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- filament-NE-02_40_58Z.jpg (202.6 KiB) 已瀏覽 343 次
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- filament-NE-02_55_18Z.jpg (205.8 KiB) 已瀏覽 343 次
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- filament-NE-02_55_45Z.jpg (155.64 KiB) 已瀏覽 343 次
Re: 3-day evolution of a filament near NE limb - 2018 May 18
more images
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- filament-NE-02_56_19Z.jpg (196.25 KiB) 已瀏覽 341 次
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