2021 April 22 Sun - solar surface in H-alpha, with AR12816, AR12817 and AR12818
AR12816 has crossed the meridian, and is today located at (S24W08). This group has been very active in the past 24 hours. 2 sunspots are visible in H-alpha. This Class-E group extends more than 10 degrees in longitude. Patches of plages are visible. Filaments are observed around this AR.
AR12817 is very close to the, solar limb and is located at (N18W81). The sunspots are clumped together. A ring of flares is observed from this AR.
AR12818 is near the SE limb, at (S17E50). A large sunspot with penumbrae is visible. Bright plages are observed, mostly to the SE.
Dark filaments are visible to the NW and SE.
The filaments near the SE limb is connected with the huge prominences there.
sunspot count: group=3, sunspot=15, R=45
Telescope: Lunt LS50T with B1200 blocking filter, and 2X barlow
Camera : ASI174MM
approximately north is up, east to the left
0則留
2021 April 22 Sun - solar surface in H-alpha, with AR12816, AR12817 and AR12818
2021 April 22 Sun - solar surface in H-alpha, with AR12816, AR12817 and AR12818
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Re: 2021 April 22 Sun - solar surface in H-alpha, with AR12816, AR12817 and AR12818
Images of AR12817
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Re: 2021 April 22 Sun - solar surface in H-alpha, with AR12816, AR12817 and AR12818
Images of AR12818
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Re: 2021 April 22 Sun - solar surface in H-alpha, with AR12816, AR12817 and AR12818
Images of filaments
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Re: 2021 April 22 Sun - solar surface in H-alpha, with AR12816, AR12817 and AR12818
more
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