2021 October 24 Sun - solar surface in Ca-K, with AR12886 and AR12887.
AR12886 is located at (S19E02) today. The large sunspot comes with mature penumbra, and is surrounded by a ring of plages.
AR12887 is located at (s26E53). About 7 sunspots are visible in Ca-K. The large sunspots come with penumbrae, and all are surrounded by bright plages. Several flares are observed.
Sunspot count: group=2, sunspot=12, R=32
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 October 24 Sun - solar surface in Ca-K, with AR12886 and AR12887.
2021 October 24 Sun - solar surface in Ca-K, with AR12886 and AR12887.
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Re: 2021 October 24 Sun - solar surface in Ca-K, with AR12886 and AR12887.
Images of AR12887
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- cak-AR12887-102034.png (282.97 KiB) 已瀏覽 81 次
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- cak-AR12887-102102.png (283.46 KiB) 已瀏覽 81 次
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