AR12678 31st July

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AR12678 31st July

Post by marktownley » Sat Aug 01, 2020 10:30 am

Hi All,

Yesterday was up and early first thing with blue skies before the rising heat took temperatures into the mid 30s by the afternoon and then by evening the temperature had dropped 10 degrees accompanied by thunderstorms, all in a days weather! I was keen to refresh my memory of my 5" scope, this has been stopped down to 118mm to take it to f10, and the spacing between the flint and crown components of the objective increased to improve performance at either end of the spectrum. I'm pleased with it's performance in Ha, and when seeing allows is a good scope at 656nm, and if seeing does not allow I have the fall back of the SM90. In CaK it's not as good, and the images are soft, much softer than with the 100mm TaL refractor, however it's fun to try, and with this shot the seeing was definitely not quite as good as the aperture allowed, but it just about works and gives nice scale. (118mm f27). Camera for both shots was the FLIR IMX174, and with suitably (transparent) filtration exposure time is kept short of 5ms at all times.

Imagear12768-cak-bw by Mark Townley, on Flickr

Imagear12768-cak-colour by Mark Townley, on Flickr

Imagear12768-Ha-bw by Mark Townley, on Flickr

Imagear12768-Ha-colour by Mark Townley, on Flickr

It's nice to have some activity to look at currently!

Hope is sunny where you are, looks like i'm in for a day of cloud...

Mark


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Re: AR12678 31st July

Post by dhkaiser » Sat Aug 01, 2020 11:15 am

Well done Mark. And the new area on the east limb looks promising. Clouds here.


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Re: AR12678 31st July

Post by Montana » Sat Aug 01, 2020 11:34 am

Very nice images indeed Mark :bow :hamster: for some reason my magnifier glass on Flickr doesn't work on this computer and so I have to go to view all sizes then large, any ideas how I can set the magnifier or is that a default in Flickr?

They do look good at full size though :)

Alexandra



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Re: AR12678 31st July

Post by krakatoa1883 » Sat Aug 01, 2020 11:41 am

A fine set of images. How did you establish the optimal lens spacing for H-alpha ?


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Re: AR12678 31st July

Post by marktownley » Sat Aug 01, 2020 11:50 am

Thanks Dan, Alexandra and Raf!

Alexandra, i've no idea how to do the magnifier thing in flickr? When I click on them it just pulls them up large then I click again for full size.

Raf, I just put some thicker foil spacers between the lenses (take away food carton) - nothing scientific, just probably increased the spacing by 100%.

In the mean time here's a 8 frame ani over 7 minutes of some coronal rain from that flame prom,

Imagecoronal-rain by Mark Townley, on Flickr


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Re: AR12678 31st July

Post by dhkaiser » Sat Aug 01, 2020 11:52 am

A lot of action there in the animation for 7 minutes!


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Re: AR12678 31st July

Post by marktownley » Sat Aug 01, 2020 12:01 pm

dhkaiser wrote:
Sat Aug 01, 2020 11:52 am
A lot of action there in the animation for 7 minutes!
I was surprised too!


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Re: AR12678 31st July

Post by Montana » Sat Aug 01, 2020 12:23 pm

Wow!! that's a cracker Mark!

Alexandra



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Re: AR12678 31st July

Post by Starry Jack » Sat Aug 01, 2020 1:32 pm

I love the AR and the prom. Clean and crisp, both.

Jack


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Re: AR12678 31st July

Post by rsfoto » Sat Aug 01, 2020 2:23 pm

Hi Mark,

Very good images. Interesting is that in CaK you see the pores and in H-alpha they are not visible.


regards Rainer

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Re: AR12678 31st July

Post by Valery » Sat Aug 01, 2020 2:24 pm

Excellent results, Mark I see you finally was blessed with a good seeing. Love all these images and animation.


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Re: AR12678 31st July

Post by eroel » Sat Aug 01, 2020 2:52 pm

Mark:
Beautiful even and clean images, as also the super animation.
Best regards,
Eric.



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Re: AR12678 31st July

Post by ffellah » Sat Aug 01, 2020 7:43 pm

A beautiful series with great detail, Mark. I love the animation !

Franco :seesaw



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Re: AR12678 31st July

Post by pedro » Sat Aug 01, 2020 8:02 pm

Great images and animation Mark. The sun is getting more active



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Re: AR12678 31st July

Post by solardave » Sat Aug 01, 2020 9:12 pm

great images mark love the animation its being a bit rude though don't you think haha


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Re: AR12678 31st July

Post by DeepSolar64 » Sat Aug 01, 2020 9:54 pm

Very nice work Mark! All are great but I love the big prom rain animation. That is a lot of ongoing change for seven minutes. That is one thing I love about solar astronomy. The Sun is always in constant motion/change.


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Re: AR12678 31st July

Post by ammonthenephite » Sun Aug 02, 2020 5:43 am

Amazing as always, and killer detail in that animation!


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Re: AR12678 31st July

Post by Carbon60 » Sun Aug 02, 2020 6:07 am

Superb images, Mark. Your seeing conditions were better than mine and you can see that with your superior resolution of the finer details in CaK. Lovely.

The animation is sublime. Beautifully captured plasma rain condensing from the tall stack. Quite mesmerising.

Stu.


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Re: AR12678 31st July

Post by marktownley » Sun Aug 02, 2020 9:24 am

Thanks everyone for your kind comments! Very much appreciated.


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Re: AR12678 31st July

Post by rsfoto » Sun Aug 02, 2020 3:31 pm

Hi Mark,

Congratulations for the SPoD. Well deserved.


regards Rainer

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Re: AR12678 31st July

Post by marktownley » Sun Aug 02, 2020 4:39 pm

Whoop whoop! Thanks for the SPoD! :)


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Re: AR12678 31st July

Post by MapleRidge » Mon Aug 03, 2020 12:22 pm

Superb animation Mark :bow

Brian


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