Sun in Ha and CaK 7th April 2021

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Sun in Ha and CaK 7th April 2021

Post by Carbon60 »

A couple of disks in Ha and CaK showing the Sun as of 7th April 2021. The seeing conditions were better than in recent days, but closer views were again made quite a challenge with lots of fine scale shimmering. I made one image in Ha of a small magnetically disturbed region. Other attempts just ended up blurred and in the bin.

First up is the disk in Ca II K presented in mono and colour formats.

Image20210407_CaK_FD by Stuart Green, on Flickr

Image20210407_CaK_FD_colour by Stuart Green, on Flickr

...and then over to Hydrogen Alpha, triple stacked on a Lunt 60. There's a bit of 'blooming' on the left which I failed to spot during capture, but adjusting the background to remove this takes away the proms, so I've left well alone.

Image20210407_Ha_FD by Stuart Green, on Flickr

Image20210407_Ha_FD_colour by Stuart Green, on Flickr

Here's the closer view of the small region captured on my 150mm/DS Lunt 35 mod.

Image20210407_Ha_chrom1_Mono by Stuart Green, on Flickr

I did try to image the main prom on display, but that just ended up a blurred mess under the seeing conditions at my location today.

Thanks for looking.

Stu.


H-alpha, WL and Ca II K imaging kit for various image scales.
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More images at http://www.flickr.com/photos/solarcarbon60/
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Re: Sun in Ha and CaK 7th April 2021

Post by dhkaiser »

Nice disks Stu.


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Re: Sun in Ha and CaK 7th April 2021

Post by marktownley »

Great results Stu! We woke to it white over with a skittering of snow this morning, has all since melted. Just cloud remains so a day of hifi I think instead...


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Re: Sun in Ha and CaK 7th April 2021

Post by EGRAY_OBSERVATORY »

Fine images Stu with CaK being my favs..

Thanks for sharing

Terry


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Re: Sun in Ha and CaK 7th April 2021

Post by Stardust5858 »

Lovely captures Stu, clouds here, thanks for sharing.


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Re: Sun in Ha and CaK 7th April 2021

Post by DeepSolar64 »

Very nice work Stu. The color Ha image shows the filaprom in the south very well.


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Re: Sun in Ha and CaK 7th April 2021

Post by Carbon60 »

Many thanks, everyone. Much appreciated. Back to clouds and rain here.

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 7th April 2021

Post by Montana »

Lovely discs Stuart, you are getting some might fine full discs now :bow :hamster: still no snow here

Alexandra


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Re: Sun in Ha and CaK 7th April 2021

Post by Carbon60 »

Many thanks, Alexandra. The new Lunt front etalon has certainly made a huge difference, especially in combination with the Coronado BF. Triple stacking gets close to optimal narrow bandwidth to meet my requirements for a much more even disk, including both surface and prom details in one take. :)

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 7th April 2021

Post by krakatoa1883 »

Great images, Stu. Side reflections are an annoying problem with most filters, better to leave them, however, than sacrifice the detail.


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Re: Sun in Ha and CaK 7th April 2021

Post by MAURITS »

Beautiful images Stu.


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Re: Sun in Ha and CaK 7th April 2021

Post by eroel »

Stu:
Beautiful clean work as usual.
Best regards,
Eric.


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Re: Sun in Ha and CaK 7th April 2021

Post by Carbon60 »

Many thanks, guys. Much appreciated.

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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