11/5/2020 Retreating penumbral fibril!

[Kitsunegari]

I am thankful for the unseasonable weather and imaging i have getting.

 

This is shot with my super high speed camera.   If you pay attention to the sunspot penumbra you will see a little worm like appendage retreating into its core.  Also notice the pulsating center.

 

Captured at 500fps.  

 

 

 

and the rest of the film captures that larger fibril get sucked back down the drain.      . 

 

Edited November 5, 2020 by Kitsunegari

[Rusted]

Fascinating! Well done!

What is the frame rate for what we are seeing on the forum?
I'm trying to get at the reduction ratio of your "slow motion" video.

We tend to think of everything "up there" as static.
The sun is the most obviously active object we can see.

[Kitsunegari]

4 hours ago, Rusted said:

Fascinating! Well done!

What is the frame rate for what we are seeing on the forum?
I'm trying to get at the reduction ratio of your "slow motion" video.

We tend to think of everything "up there" as static.
The sun is the most obviously active object we can see.

Frames captured=7000

capture Duration=13.419s

Total animation frames = 60

 

 

FPS (avg.)=521
Shutter=1.802ms
 

First frame start time = 201938.537    -     First video capture at  ‏‎2:19:38pm

last frame start time = 203450.293  -    Last video captured at  2:34:36pm

Total stacked images per animation frame = 1000

 

 

Total video capture duration time 900 seconds     . 

 

60 videos x 1000 stacked =  60,000 total video frames extracted from  420,000 total frames captured   (best 7% in autostakkert)

 

This should be enough info to determine the integrated frames per second.   It seems somewhere in the ballpark of 115-120       

 

 it is still 15  minutes  of elapsed total time however,

 

 

 

   

 

 

 

 

 

[Rusted]

Thanks.

[GreatAttractor]

Really great animations. Can you remind us what telescope was used?

[Kitsunegari]

5 hours ago, GreatAttractor said:

Really great animations. Can you remind us what telescope was used?

This current configuration is an explore scientific "firstlight 127mm x 1200mm achromat"   https://explorescientificusa.com/products/fl-ar1271200maz01?_pos=4&_sid=04fde915d&_ss=r

There is a meade 2x triplet barlow in the focuser, before all of my filters;  threaded directly onto the nosepiece of my 2" skybender.

 

The camera is placed 165mm after the barlow, which brings the system magnification to exactly 3.3x.      this is very close to critical sample on the IMX174 sensor

 

127 x 3960mm

basler usb3.; aca1920-155um ,   and a aca720-540um   

 

https://www.baslerweb.com/en/products/cameras/area-scan-cameras/ace/aca720-520um     IMX287 sensor   

Pixel Size (H x V)

6.9 µm x 6.9 µm

 

https://www.baslerweb.com/en/products/cameras/area-scan-cameras/ace/aca1920-155um/

 

Pixel Size (H x V)

5.86 µm x 5.86 µm

 

 

 

Because the filters are now operating inside of my barlow, i have lost most of my tuning ability .  it shifted my desired wavelength of everything in my filter train by an unknown amount.  

 

 

I do recommend useing a meade 2x telenegative barlow at 2.25x however.  anything higher stretches the image.       

 

Televue 2.5x powermate sucks regardless of placement..   ,    explore  scientific 3x tele-extender sucks as well..

Edited November 7, 2020 by Kitsunegari

[Pete Presland]

excellent image