Full Disk Mosaic in Ha with AR12822 and AR12823

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minhlead
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Full Disk Mosaic in Ha with AR12822 and AR12823

Post by minhlead »

I try to do a mosaic with my 107 scope and the result is underwhelming. Maybe bad seeing is contributing to some local lost of contrast.
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15 panels, 100 best of 500 frames each.


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Re: Full Disk Mosaic in Ha with AR12822 and AR12823

Post by EGRAY_OBSERVATORY »

That's a beautiful image under the "seeing conditions" Minh.
Thanks for sharing

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Re: Full Disk Mosaic in Ha with AR12822 and AR12823

Post by Montana »

That's a great attempt :bow :hamster: doing a mosaic is a tough job especially with 15 panels, you did very well. It takes a lot of luck to get a seamless image with consistency between panels and the greater the number the chances get harder.

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Re: Full Disk Mosaic in Ha with AR12822 and AR12823

Post by minhlead »

Montana wrote: Wed May 12, 2021 12:53 pm That's a great attempt :bow :hamster: doing a mosaic is a tough job especially with 15 panels, you did very well. It takes a lot of luck to get a seamless image with consistency between panels and the greater the number the chances get harder.

Alexandra
Thanks Alexandra. It's really hell of a job aligning and blending the mosaic.
EGRAY_OBSERVATORY wrote: Wed May 12, 2021 10:44 am That's a beautiful image under the "seeing conditions" Minh.
Thanks for sharing

Terry
I've never thought bad seeing even under high transparentcy can affects things that much. I'll be better prepared next time.


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Re: Full Disk Mosaic in Ha with AR12822 and AR12823

Post by EGRAY_OBSERVATORY »

Indeed Minh, just a matter of patience for the best weather and more practice too..

Best Wishes
terry


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Re: Full Disk Mosaic in Ha with AR12822 and AR12823

Post by marktownley »

Good result in the circumstances, Quarks aren't designed for this, you're also off band (in the red). Try stopping the 107 down.


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Re: Full Disk Mosaic in Ha with AR12822 and AR12823

Post by minhlead »

marktownley wrote: Wed May 12, 2021 7:04 pm Good result in the circumstances, Quarks aren't designed for this, you're also off band (in the red). Try stopping the 107 down.
Yeah, the Quark going off band due to the extreme ambient heat that day (about 40 degree celsius). Could you please share how did you know that?


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Re: Full Disk Mosaic in Ha with AR12822 and AR12823

Post by DeepSolar64 »

minhlead wrote: Thu May 13, 2021 12:05 am
marktownley wrote: Wed May 12, 2021 7:04 pm Good result in the circumstances, Quarks aren't designed for this, you're also off band (in the red). Try stopping the 107 down.
Yeah, the Quark going off band due to the extreme ambient heat that day (about 40 degree celsius). Could you please share how did you know that?

I wondered that too. Mark has good eyes and lots of experience. Still, how can he tell that. It's not obvious to my inexperienced eyes.


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Re: Full Disk Mosaic in Ha with AR12822 and AR12823

Post by Montana »

If you look closely you will see dark rosettes of mottles across the disc, they are flat and dark with white patches between. If on band the mottles would be 3D in structure and fluffy with no obvious white patches around, the surface would be more uniform and stuck up like grass. Very hard to describe but if you look at Rainers images you see this bumpy effect of mottles rather than dark rosettes viewtopic.php?f=4&t=31709

I hope this helps ;)

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Re: Full Disk Mosaic in Ha with AR12822 and AR12823

Post by minhlead »

Montana wrote: Thu May 13, 2021 8:06 am If you look closely you will see dark rosettes of mottles across the disc, they are flat and dark with white patches between. If on band the mottles would be 3D in structure and fluffy with no obvious white patches around, the surface would be more uniform and stuck up like grass. Very hard to describe but if you look at Rainers images you see this bumpy effect of mottles rather than dark rosettes viewtopic.php?f=4&t=31709

I hope this helps ;)

Alexandra
Thanks Alexandra. I kinda see it now. But I still have a question, how did Mark know I was in the red ?


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Re: Full Disk Mosaic in Ha with AR12822 and AR12823

Post by Montana »

Well, there is a simple answer to that but you have to look very closely. According to Zirin (Astrophysics of the Sun) p 174 in the blue wing the spicules are doubles called 'twinning'. In the red wing the spicules are singles. That is the only way I know that you can tell. I need to scan in the photo for you don't I :)

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Re: Full Disk Mosaic in Ha with AR12822 and AR12823

Post by Montana »

Blue wing twinning.jpg
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Re: Full Disk Mosaic in Ha with AR12822 and AR12823

Post by minhlead »

Montana wrote: Thu May 13, 2021 2:09 pm Well, there is a simple answer to that but you have to look very closely. According to Zirin (Astrophysics of the Sun) p 174 in the blue wing the spicules are doubles called 'twinning'. In the red wing the spicules are singles. That is the only way I know that you can tell. I need to scan in the photo for you don't I :)

Alexandra
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Re: Full Disk Mosaic in Ha with AR12822 and AR12823

Post by rsfoto »

Hi,

That is an excellent result for using 15 panels. The H-alpha also from my point of view is in Band. Maybe put a bit more attention in focusing ?

IMHO


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Re: Full Disk Mosaic in Ha with AR12822 and AR12823

Post by minhlead »

rsfoto wrote: Thu May 13, 2021 4:04 pm Hi,

That is an excellent result for using 15 panels. The H-alpha also from my point of view is in Band. Maybe put a bit more attention in focusing ?

IMHO
Since the seeing was so bad I can't chase the focus and settle on what "looks" the best. Will try again with better seeing later. Thanka


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Re: Full Disk Mosaic in Ha with AR12822 and AR12823

Post by marktownley »

minhlead wrote: Thu May 13, 2021 11:06 am
Montana wrote: Thu May 13, 2021 8:06 am If you look closely you will see dark rosettes of mottles across the disc, they are flat and dark with white patches between. If on band the mottles would be 3D in structure and fluffy with no obvious white patches around, the surface would be more uniform and stuck up like grass. Very hard to describe but if you look at Rainers images you see this bumpy effect of mottles rather than dark rosettes viewtopic.php?f=4&t=31709

I hope this helps ;)

Alexandra
Thanks Alexandra. I kinda see it now. But I still have a question, how did Mark know I was in the red ?
For exactly the reason Alexandra has just described! :)


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