2020 September 10 Sun - prominences on the NE solar limb
The prominence images are better viewed in Ca-K than H-alpha. The reason is simple: when I switch to H-alpha, clouds prevent the imaging session.
I am showing the prominences in 2 wavelengths, if possible.
In general, the prominences are much brighter in H-alpha than in Ca-K, despite the much larger aperture (80 mm f/6.25 vs 35 mm f/11.5) used for H-alpha.
Sunspot count: group=0. sunspots=0, R=0
For H-alpha images:
Telescope: Lunt LS35T with B600 blocking filter
Camera : ASI174MM
exposure: 6.50 ms
For Ca-K images:
Telescope: Sharpstar AL-80 II, 8 cm f/6.25 APO refractor
Camera : ASI174MM
focal length : 500 mm f/6.25
filter: Lunt Ca-K Module B1200
exposure: 9.50 ms
approximately south is up, east to the left
2020 September 10 Sun - prominences on the NE solar limb
2020 September 10 Sun - prominences on the NE solar limb
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Re: 2020 September 10 Sun - prominences on the NE solar limb
Images in Ca-K
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- cak-prom-NE-140403.jpg (42.43 KiB) 已瀏覽 92 次
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- cak-prom-NE-140558.jpg (32.62 KiB) 已瀏覽 92 次
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- cak-prom-NE-140948.jpg (38.42 KiB) 已瀏覽 92 次
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- cak-prom-NE-142243.jpg (26.21 KiB) 已瀏覽 92 次
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