Solar minimum group

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krakatoa1883
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Solar minimum group

Post by krakatoa1883 »

A very small group emerged yesterday on the south hemisphere (AR12718), just few minor spots without penumbra. It is a typical solar minimum group, however observing in WL I noted in addition several faculae, small but very bright, close to the N polar region. Small signs of activity, may be indicating that something is about to happen ?
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2018-08-15-1201-RB-CaH-AR12718.jpg
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2018-08-15-1150-RB-CaH- fulldisc.jpg
2018-08-15-1150-RB-CaH- fulldisc.jpg (437.58 KiB) Viewed 1406 times


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Re: Solar minimum group

Post by marktownley »

Good capture Raf, I saw this one growing on GONG today.


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Re: Solar minimum group

Post by Valtori »

Hi Raf,

Very nice CaK shots, HR & FD!

Val


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Re: Solar minimum group

Post by ffellah »

Great shots, Raf. AR2718 is tiny !

Franco


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Re: Solar minimum group

Post by Derek Klepp »

Hey Raf at least it’s a spot.


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Re: Solar minimum group

Post by Montana »

I think Calcium K or H is really going to show us a lot more activity over minimum than you think (minimum is classed in WL observations). It will be fun to watch these bright areas come and go.
:hamster: :bow
Alexandra


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Re: Solar minimum group

Post by krakatoa1883 »

Thanks to all. Alexandra, you're right, I remember, decades ago, observing the sun only in WL during minimum was really boring :D

I observed the group again this morning through a Baader K filter, there were less spots, only three, but the main one seems to have developed a rudimentary penumbra. The cluster of faculae close to the N pole still persist, it can be barely seen in the below full disc.
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2018-08-16-0836-RB-Kline-AR12718.jpg
2018-08-16-0836-RB-Kline-AR12718.jpg (170.77 KiB) Viewed 1359 times
2018-08-16-0820-RB-K line- fulldisc.jpg
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Re: Solar minimum group

Post by Montana »

That's still a cracking spot for this time in the cycle (any will do :hamster:) interesting it is trying to form penumbra, let's hope it grows.

Alexandra


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Re: Solar minimum group

Post by ffellah »

Nice additions, Raf

Franco


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