Sun in Ha and CaK 22nd Feb 2021

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Carbon60
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Sun in Ha and CaK 22nd Feb 2021

Post by Carbon60 » Mon Feb 22, 2021 8:03 pm

After a wet, cloudy, morning the afternoon sky opened up to become beautifully blue and almost cloudless.

Here are some images captured in Ha and CaK using, respectively, my DS Lunt 60 and Tecnosky 125 with a B1800 Lunt CaK filter (no additional filters were used this time around).

Image20210222_Ha_FD2_Mono by Stuart Green, on Flickr

Image20210222_Ha_FD2_colour by Stuart Green, on Flickr

Image20210222_CaK_FD_Mono by Stuart Green, on Flickr

Image20210222_CaK_FD_colour by Stuart Green, on Flic

The full disk images show a three nice little 'hot spots' of activity, but more impressive is the large prom towards the south west. Here it is in close up, captured on my 150mm/Lunt 35 mod.

Image20210222_Ha_Prom by Stuart Green, on Flickr

There are a couple of fainter proms in the south east, also captured using the same scope.

Image20210222_Ha_Prom2 by Stuart Green, on Flickr

I was hoping to make an animation of the larger prom, but although the sky was perfect, I was starting to hit the various shadows cast by obstacles around my plot, namely trees and my neighbour's roof apex. Maybe next time.

Thanks for looking.

Stu.


H-alpha, WL and Ca II K imaging kit for various image scales.
Fluxgate Magnetometers (1s and 150s Cadence).
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More images at http://www.flickr.com/photos/solarcarbon60/
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Re: Sun in Ha and CaK 22nd Feb 2021

Post by marktownley » Mon Feb 22, 2021 8:10 pm

A lovely set of images Stu! The seeing stood up well with the big Ha scope.


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Re: Sun in Ha and CaK 22nd Feb 2021

Post by dhkaiser » Mon Feb 22, 2021 8:31 pm

Very sharp images, love the proms!


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Re: Sun in Ha and CaK 22nd Feb 2021

Post by Stardust5858 » Mon Feb 22, 2021 9:06 pm

Lovely captures Stu, I loved the structure of the South Western prom. I too managed to image it, you processed it very nicely. Thanks for sharing.


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Re: Sun in Ha and CaK 22nd Feb 2021

Post by EGRAY_OBSERVATORY » Mon Feb 22, 2021 10:12 pm

Excellent set of images Stu and the proms are fab.

Thanks for sharing
Terry


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Re: Sun in Ha and CaK 22nd Feb 2021

Post by ffellah » Tue Feb 23, 2021 1:23 am

Super shots, Stu ! Those prom images are cracking...

Franco


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Re: Sun in Ha and CaK 22nd Feb 2021

Post by MapleRidge » Tue Feb 23, 2021 3:43 am

Superb series of images Stu :bow

That SW prom is gorgeous!!!

Brian


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Re: Sun in Ha and CaK 22nd Feb 2021

Post by DeepSolar64 » Tue Feb 23, 2021 6:32 am

Very nice work Stu! The prom closeups are incredible!!


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Re: Sun in Ha and CaK 22nd Feb 2021

Post by Carbon60 » Tue Feb 23, 2021 6:44 am

Many thanks, everyone. I really appreciate your comments.

I've re-processed the Ha FD with inverted proms, increasing the disk contrast.

Image20210222_Ha_FD2_Mono_Inverted Proms by Stuart Green, on Flickr


H-alpha, WL and Ca II K imaging kit for various image scales.
Fluxgate Magnetometers (1s and 150s Cadence).
Radio meteor detector.
More images at http://www.flickr.com/photos/solarcarbon60/
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Re: Sun in Ha and CaK 22nd Feb 2021

Post by Montana » Tue Feb 23, 2021 8:55 am

Wow!! the last couple of high res proms shots are breathtaking, the detail is superb and all the little spicule points around the limb are delightful. The seeing must have been pretty good :hamster: :bow

Alexandra


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Re: Sun in Ha and CaK 22nd Feb 2021

Post by MapleRidge » Tue Feb 23, 2021 12:50 pm

The re-worked FD image is awesome!!!

Brian


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Photos: https://www.flickr.com/photos/185395281@N08/albums

10'x15 Roll-off Roof Observatory
Takahashi EM400 Mount carrying:
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Deep Sky Work - Canon 60D (Ha mod), SBIG STF8300/FW8, ONAG
Planetary Work - SBIG CFW10, ASI290MM/ASI462+ADC

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Re: Sun in Ha and CaK 22nd Feb 2021

Post by Carbon60 » Wed Feb 24, 2021 7:35 am

Many thanks, everyone.

Stu.


H-alpha, WL and Ca II K imaging kit for various image scales.
Fluxgate Magnetometers (1s and 150s Cadence).
Radio meteor detector.
More images at http://www.flickr.com/photos/solarcarbon60/
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Re: Sun in Ha and CaK 22nd Feb 2021

Post by arnedanielsen » Wed Feb 24, 2021 7:38 pm

Wonderful images, Stu! I love how smooth the transition is from the disc the prominence and how sharp the spicules are!

Best regards,
Arne


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