2020 September 07 Sun - prominences on the NW solar limb
In Ca-K, 3 prominences are visible. However, only the 2 to the north are seen.
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: 5.40 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: 6.50 ms
approximately south is up, east to the left
2020 September 07 Sun - prominences on the NW solar limb
2020 September 07 Sun - prominences on the NW solar limb
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Re: 2020 September 07 Sun - prominences on the NW solar limb
Images in Ca-K
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- cak-prom-143435.png (69.97 KiB) 已瀏覽 170 次
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- cak-prom-NW-144827.jpg (46.46 KiB) 已瀏覽 170 次
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- cak-prom-NW-144852.jpg (42.11 KiB) 已瀏覽 170 次
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- cak-prom-NW-144954.jpg (34.5 KiB) 已瀏覽 170 次
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