A Tour Round The Sun 3rd August

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marktownley
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A Tour Round The Sun 3rd August

Post by marktownley »

Hi Everyone.

Tuesday dawned with blue skies, and with activity looking to build again I decided to setup early and make the most of things before the inevitable cloud filled the sky. It was not a day for big guns, with Meteoblue telling me seeing was going to be in the range of just below 2". Knowing we are in an unsettled regime I suspected this would be right, and indeed it was, so settled on 60mm f20 (127/1200 stopped down to 60mm) for CaK, and the Ha with the Double stacked SM90 running about f16. The camera used for close ups was the ZWO290mm.

First off though full disks, and the CaK 60mm f16 with the ICX814 chipped Flir camera.

ImageCaK-fd-60mm-f16-ICX814 by Mark Townley, on Flickr

Then, Ha, with the 50mm lunt etalon on the 60mm f6 scope, double stacked with the Quark, again ICX814 chipped camera with a 0.5x reducer.

ImageHa-FD-DS by Mark Townley, on Flickr

In a previous post Minh asked about how much vignetting there is with this setup, and the following shot gives an idea where this starts in the fov.

Imageminh by Mark Townley, on Flickr

I photoshopped a circle on which shows the approximate region within it where is fine to image.

Imageminh by Mark Townley, on Flickr

Anyways, back to the features and a whizz around... First off a bright patch that has appeared on the approaching limb, doesn't seem to be much happening with it at the moment, maybe it will grow?

ImageNew-Activity-CaK-60mm-f20-290mm by Mark Townley, on Flickr

ImageNew-Activity-Ha-DS-90mm-f16-290mm by Mark Townley, on Flickr

There was a nice flame prom visible a bit further north than this...

ImageFlame-Prom-Ha-DS-90mm-f16-290mm by Mark Townley, on Flickr

On the departing limb there is some plage in the northern hemisphere with a couple of small proms...

ImageNorther-Activity-Ha-DS-90mm-f16-290mm by Mark Townley, on Flickr

Then moving onto the southern departing quadrant AR12850 which has been steadily developing over the last 24 hours...

ImageAR12850-CaK-60mm-f20-290mm by Mark Townley, on Flickr

ImageAR12850-HA-DS-90mm-f16-290mm by Mark Townley, on Flickr

I like this complementary setup of 60mm f20 CaK and 90mm f16 DS Ha, gives a nice mid scale to image in when we're in unsteady air, which is most of the time here in the UK. Both wavelengths come out at roughly the same image size.

Hoping I can image again tomorrow morning, looks like it will be clear very first thing then cloud over after about 10am. Meteoblue saying seeing of 1.7" tomorrow, so maybe a bit of an improvement!

Hope you like and hope is sunny where you are!

Mark


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Re: A Tour Round The Sun 3rd August

Post by Ivan »

Hi Mark,

Great set of FD's and close-ups. The size of the non-vignetted field is quite decent.

Ivan


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Re: A Tour Round The Sun 3rd August

Post by DeepSolar64 »

Mark,
I always enjoy your work, especially your very good CaK stuff.

James


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Re: A Tour Round The Sun 3rd August

Post by minhlead »

marktownley wrote: Tue Aug 03, 2021 2:18 pm Hi Everyone.

Tuesday dawned with blue skies, and with activity looking to build again I decided to setup early and make the most of things before the inevitable cloud filled the sky. It was not a day for big guns, with Meteoblue telling me seeing was going to be in the range of just below 2". Knowing we are in an unsettled regime I suspected this would be right, and indeed it was, so settled on 60mm f20 (127/1200 stopped down to 60mm) for CaK, and the Ha with the Double stacked SM90 running about f16. The camera used for close ups was the ZWO290mm.

First off though full disks, and the CaK 60mm f16 with the ICX814 chipped Flir camera.

ImageCaK-fd-60mm-f16-ICX814 by Mark Townley, on Flickr

Then, Ha, with the 50mm lunt etalon on the 60mm f6 scope, double stacked with the Quark, again ICX814 chipped camera with a 0.5x reducer.

ImageHa-FD-DS by Mark Townley, on Flickr

In a previous post Minh asked about how much vignetting there is with this setup, and the following shot gives an idea where this starts in the fov.

Imageminh by Mark Townley, on Flickr

I photoshopped a circle on which shows the approximate region within it where is fine to image.

Imageminh by Mark Townley, on Flickr

Anyways, back to the features and a whizz around... First off a bright patch that has appeared on the approaching limb, doesn't seem to be much happening with it at the moment, maybe it will grow?

ImageNew-Activity-CaK-60mm-f20-290mm by Mark Townley, on Flickr

ImageNew-Activity-Ha-DS-90mm-f16-290mm by Mark Townley, on Flickr

There was a nice flame prom visible a bit further north than this...

ImageFlame-Prom-Ha-DS-90mm-f16-290mm by Mark Townley, on Flickr

On the departing limb there is some plage in the northern hemisphere with a couple of small proms...

ImageNorther-Activity-Ha-DS-90mm-f16-290mm by Mark Townley, on Flickr

Then moving onto the southern departing quadrant AR12850 which has been steadily developing over the last 24 hours...

ImageAR12850-CaK-60mm-f20-290mm by Mark Townley, on Flickr

ImageAR12850-HA-DS-90mm-f16-290mm by Mark Townley, on Flickr

I like this complementary setup of 60mm f20 CaK and 90mm f16 DS Ha, gives a nice mid scale to image in when we're in unsteady air, which is most of the time here in the UK. Both wavelengths come out at roughly the same image size.

Hoping I can image again tomorrow morning, looks like it will be clear very first thing then cloud over after about 10am. Meteoblue saying seeing of 1.7" tomorrow, so maybe a bit of an improvement!

Hope you like and hope is sunny where you are!

Mark
Thanks Mark, for the FOV test. Excellent shots btw. Figure I'd need a 2 inches reducer since I am using a much larger sensor. (M4/3)


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Re: A Tour Round The Sun 3rd August

Post by MAURITS »

Excellent captures Mark great sharp Cak images too.


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Re: A Tour Round The Sun 3rd August

Post by EGRAY_OBSERVATORY »

Thanks Mark for sharing your excellent captures.

Only Sunny late this afternoon and could not get to the observatory then, but possibly some night imaging.

Terry


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Re: A Tour Round The Sun 3rd August

Post by Petrus »

Your CaK images are always so fabulous Mark!


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Re: A Tour Round The Sun 3rd August

Post by marktownley »

Thanks everyone for your kind words! Just cloud here this morning...


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Re: A Tour Round The Sun 3rd August

Post by Carbon60 »

Looks like we were out imaging the same features in Ha and CaK at about the same time, Mark.

A great set of results :)

Stu.


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Re: A Tour Round The Sun 3rd August

Post by banjo »

Sans titre 1.gif
Sans titre 1.gif (10.9 KiB) Viewed 471 times


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Re: A Tour Round The Sun 3rd August

Post by ffellah »

A very nice set, Mark. Smart of you to stay with small apertures, thank you for the screen shots. What does the Flip Y do ?

Franco


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Re: A Tour Round The Sun 3rd August

Post by arnedanielsen »

A really good set of images! Looks like you managed to make the most out of the conditions.

Best regards,
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Re: A Tour Round The Sun 3rd August

Post by AndiesHandyHandies »

Hi

The detail of the prom group in CAK was similar to what I could see in the 90mm and 4.2x Chromo, perhaps the 4 larger spots for me.

Sunny morning spent messing about.

A SW/Celestron 100mm F5 stopped down to 50mm did well with the 3x Revelation and Prom Quark. Actually 3x.

Cheers. Andrew.


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Re: A Tour Round The Sun 3rd August

Post by marktownley »

Thanks everyone for the kind comments. 'Flip Y' simply flips the image vertically prior to being recorded, just so I get the correct final orientation.


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Re: A Tour Round The Sun 3rd August

Post by MapleRidge »

Superb set of images Mark...well done :bow

Brian


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Re: A Tour Round The Sun 3rd August

Post by marktownley »

Thanks Brian, looks like we have rain for several days now.


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