The Sun in Ca-K - 30th May 2020

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David_The_Bears_Fan
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The Sun in Ca-K - 30th May 2020

Post by David_The_Bears_Fan » Sat May 30, 2020 11:09 am

Been a while since I posted here, so I thought I would pop back and say "Hi". Hope you are all doing well. I took a bit of an enforced a break from solar over the winter as I loose the Sun from mid-November until mid Feb (due to trees) and then other things just got in the way! I'm back to imaging consistently now and have a Quark on order for some H alpha fun in a couple of weeks when it arrives.

Lots to see in Ca-K today, a new plage area rounded the limb overnight and there are a collection of new proms associated with it. The plage area that rounded the limb a couple of days back is still going strong and has a nice prom associated too. The off-going limb still has a lot of nice proms which are associated with the plage area that recently departed the Earth-facing hemisphere.

So first up my 6 pane pano full disks. All shot with the ASI178MM @ native 1000mm of the Skywatcher Evostar 120. Stacked in AS!3, sharpened in ImPPG, stitched in Autostitch and finished in GIMP 2.10. I've made some changes to my processing workflow to include some tone curve manipulation in ImPPG and tweaked Autostitch to export full size panorama rather than limiting to roughly 2000x2000px.

20200530_Ca-K_6PaneFD_Invert_4k.png
20200530_Ca-K_6PaneFD_Invert_4k.png (9.84 MiB) Viewed 350 times
20200530_Ca-K_6PaneFD_Colour_4k.png
20200530_Ca-K_6PaneFD_Colour_4k.png (15.16 MiB) Viewed 350 times

Then the proms, lots of them :D All of these were shot binned 2x2 to help with contrast

20200530_Ca-K_LimbProms.png
20200530_Ca-K_LimbProms.png (2.96 MiB) Viewed 350 times
20200530_Ca-K_Prom1.png
20200530_Ca-K_Prom1.png (2.83 MiB) Viewed 350 times
20200530_Ca-K_Prom3.png
20200530_Ca-K_Prom3.png (3.01 MiB) Viewed 350 times
20200530_Ca-K_Prom2_ROI.png
20200530_Ca-K_Prom2_ROI.png (1.46 MiB) Viewed 350 times

Last one shot with a 1.5x barlow added

20200530_Ca-K_Prom3_1.5x.png
20200530_Ca-K_Prom3_1.5x.png (1.66 MiB) Viewed 350 times


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Re: The Sun in Ca-K - 30th May 2020

Post by krakatoa1883 » Sat May 30, 2020 11:21 am

Great processing of those proms, they are really crisp.


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Re: The Sun in Ca-K - 30th May 2020

Post by David_The_Bears_Fan » Sat May 30, 2020 11:32 am

Thanks. Despite all that ImPPG can do (and it is brilliant) I still find that a last round of unsharp mask in GIMP + a touch of Gaussian blur gives me the best overall detail levels.


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Re: The Sun in Ca-K - 30th May 2020

Post by marktownley » Sat May 30, 2020 11:53 am

Good to see you back David! Great images as usual. I'm sure you will enjoy your Quark.


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Re: The Sun in Ca-K - 30th May 2020

Post by David_The_Bears_Fan » Sat May 30, 2020 12:07 pm

Thanks Mark. Only taken me a year to take the plunge on the Quark!


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Re: The Sun in Ca-K - 30th May 2020

Post by JochenM » Sat May 30, 2020 12:56 pm

Very nice, David.

You managed to capture those CaK proms quite nicely.


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Re: The Sun in Ca-K - 30th May 2020

Post by David_The_Bears_Fan » Sat May 30, 2020 1:07 pm

Thanks Jochen. Managed to catch some half-decent seeing this morning.


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Re: The Sun in Ca-K - 30th May 2020

Post by Montana » Sat May 30, 2020 2:57 pm

:hamster: great to see you back posting here David, I hope you are well :) these are fantastic and the usual beautiful CaK proms too :hamster: :bow

Alexandra



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Re: The Sun in Ca-K - 30th May 2020

Post by David_The_Bears_Fan » Sat May 30, 2020 5:16 pm

Thanks Alexandra. I am well thank you, hope you and yours are safe and well too.


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Re: The Sun in Ca-K - 30th May 2020

Post by Carbon60 » Sat May 30, 2020 8:24 pm

Welcome back, David. Lovely images to get back in the groove with :)

Stu.


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Re: The Sun in Ca-K - 30th May 2020

Post by David_The_Bears_Fan » Sat May 30, 2020 8:38 pm

Thanks Stu :bow2


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Re: The Sun in Ca-K - 30th May 2020

Post by eroel » Sat May 30, 2020 11:25 pm

David:
Good to see your beautiful work again.
Best regards,
Eric.



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Re: The Sun in Ca-K - 30th May 2020

Post by DeepSolar64 » Sun May 31, 2020 1:33 am

I love the negative appearance of your work. Nice!


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Re: The Sun in Ca-K - 30th May 2020

Post by dhkaiser » Sun May 31, 2020 1:55 am

Thanks for posting David. Interesting to see something other than Ha.


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