2018 April 13 Sun - prominences on NEE limb
Prominences show up on the E, NEE, SSE, SW and SSW limb.
These images are very faint prominence on the NEE limb .
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 April 13 Sun - prominences on NEE limb
2018 April 13 Sun - prominences on NEE limb
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- prominence-06_49_15Z.jpg (93.52 KiB) 已瀏覽 435 次
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- prominence-06_50_01Z.jpg (90.17 KiB) 已瀏覽 435 次
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- prom-NEE-07_40_52Z.jpg (72.2 KiB) 已瀏覽 435 次
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- prom-NEE-07_41_08Z.jpg (77.51 KiB) 已瀏覽 435 次
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- prom-NEE-07_42_09Z.jpg (75.58 KiB) 已瀏覽 435 次
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- prom-NEE-07_45_23Z.jpg (76.68 KiB) 已瀏覽 435 次
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- prom-NEE-07_45_37Z.jpg (72.45 KiB) 已瀏覽 435 次
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- prom-NEE-07_53_58Z.jpg (73.25 KiB) 已瀏覽 435 次
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- prom-NEE-07_57_12Z.jpg (75.24 KiB) 已瀏覽 435 次
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