TheSkySearchers

Testing a new electronic focuser with a very turbulent atmosphere. YIKES!

Telescope: Celestron 8SE / AVX CGEM mount
Camera: ASI585 MC with 1.5x Dakin magic barlow
Image source: 69,600 frame AVI videos (30% used)
De-rotated with Winjupos
Date: 02/03/2024

Apparent Diameter = Planet: 39.3 arc-seconds

Jupiter - February 3, 2024 by Greg Cisko, on Flickr

Another good one Greg.

What's your frame rate. It's generally considered best to keep Jovian videos shorter than 90 seconds to prevent rotation blur.

Graeme

Graeme1858 wrote: ↑Sun Feb 04, 2024 7:40 pm Another good one Greg.

What's your frame rate. It's generally considered best to keep Jovian videos shorter than 90 seconds to prevent rotation blur.

Graeme

Yes, it is good to keep them short as you say. I am taking 30 second videos. The big thing is the frame-rate as you asked about. The camera has a resolution of 3400x2800 or something like that. The frame rate at the max resolution is 30fps. I cropped down to 640x480 at F/15 and the frame rate shot up to 192fps! So while I had a 30 second integration time for each video, they ended up around 3:30 in length because the videos are 30fps. Each video was ~5800 frames and I took 20 videos. I put them all through pipp to re-center Jupiter and cropped down to 448x448. Then I stacked with autostakkert with alignment points set to 100, 1.5x drizzle. The resulting image was sent to registax for wavelett sharpening and I saved the resulting tiff.I just pumped all 20 videos through the autostakkert -> Registax routing using the same wavelett settings for each video. I then loaded these TIFFs into WInjupos for a very easy de-rotation. Before WInjupos I reviewed all the TIFFs and eliminated 4 of the 20 TIFFs so that is why I used 16 videos. After all this I then loaded the Winjupos TIFF into Registax again to sharpen the output a final time.

Unfortunately when I was imaging I saw Jupiter go from super-sharp to blossom totally out of focus and back into focus again. The atmosphere was super turbulent. Time to do this testing on Jupiter is running out, so I did what I could. I am certain I did everything right and the result is because of the super turbulent atmosphere.

very nice ,thx .