2021 December 03 Sun - solar surface in Ca-K, with AR12898 AR12901, AR12902 and AR12903.
AR12898 is located at (S25W78). The leading sunspot has a complete penumbra. The following patches of plages has been very active with flares.
AR12900 has turned to the backside.
AR12901 is located at (N16E10). No sunspot is visible, leaving just patches of plages.
AR12902 is located at (N18W33). The large leading sunspot is not surrounded by plages, and the smaller, following sunspots are embedded in bright plages.
AR12903 is located at (S18E15). No sunspot is visible, leaving just strips of plages.
Sunspot count: group=2, sunspot=15, R=35
Telescope: Sharpstar AL-80 II, 8 cm f/6.25 APO refractor
Camera : ASI1600MM Pro, not cooled.
focal length : 500 mm f/6.25
filter: Lunt Ca-K Module B1200
approximately north is up, east to the left.
2021 December 03 Sun - solar surface in Ca-K, with AR12898 AR12901, AR12902 and AR12903.
2021 December 03 Sun - solar surface in Ca-K, with AR12898 AR12901, AR12902 and AR12903.
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Re: 2021 December 03 Sun - solar surface in Ca-K, with AR12898 AR12901, AR12902 and AR12903.
More images of AR12898 and AR12901
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Re: 2021 December 03 Sun - solar surface in Ca-K, with AR12898 AR12901, AR12902 and AR12903.
Images of AR12902
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Re: 2021 December 03 Sun - solar surface in Ca-K, with AR12898 AR12901, AR12902 and AR12903.
Images of AR12903
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- cak-AR12903-100726.png (95.05 KiB) 已瀏覽 124 次
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- cak-AR12903-102630.png (263.25 KiB) 已瀏覽 124 次
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