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AR12709 remnants close up in the Ca II K line.

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#1 ValeryD

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Posted 27 May 2018 - 08:33 AM

Hi all

 

Early morning of May 15 was a clear with a slow breeze.  The seeing was variable from so so to good.

 

I deceided to image the sun in CaK first. 

 

Equipment used:  C11 280mm F/10 SCT on the EQ8 mount,  ARIES full size 295mm two bands DERF, 

PST CaK filter,  Basler 1920-155 camera.

 

The Sun was blank and only a tiny remnants of the AR12709 group were seen.  It looks best in the CaK line.

In the H-a it was hidden by the chromosphere and in a white light it looks like a tiny pore barely detectable 

on the desert background.

 

Such a large scale 0,13"/pix  is necessary for correct sampling at such a wave length. 

 

 

Thanks for looking and comments.

 

 

 

Valery

Attached Thumbnails

  • AR12709-May-15-2018-UT-06h-01m-C11-280mm-PST-CaK-0,13sec-pix.jpg

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#2 MalVeauX

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Posted 27 May 2018 - 08:43 AM

Lovely detail Valery!

 

Very best,



#3 spereira

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Posted 27 May 2018 - 11:10 AM

Your images always make me say "wow," Valery!  Thanks!

 

smp



#4 rigel123

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Posted 27 May 2018 - 08:58 PM

waytogo.gif



#5 ValeryD

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Posted 29 May 2018 - 10:23 AM

Thanks,  guys, for your kind words.

 

 

Valery




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