Contains:  Solar system body or event
Jupiter and Ganymede 1-2-2024 MST, Steve Lantz

Jupiter and Ganymede 1-2-2024 MST

Acquisition type: Lucky imaging

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Acquisition details

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Description

I just got back from two weeks in New Zealand and am now catching up on my comms in Astrobin, so I apologize for not being up to date.  But in the meantime, I wanted to post a Jupiter image that is not the greatest, but at least I'll have a record of it in my image collection.  A number of you have told me that you are thinking about doing planets, so I thought I would make this post a bit of a simple primer on basic steps.  The final image posted here is a processed compilation of 11,344 individual video frames chosen by the software (AstroStakkert) as the best out of a total of 18297 frames from 19 videos.  Panel B shows a typical individual video frame used in the compilation.  The seeing was mediocre, as is evidenced by the graininess and distortions in the image.  But the magic is that the stacking of a large number of images suppresses noise and enhances detail.  The stacking of the best frames (I chose 62%) was done for each of the 19 videos.  Panel C shows the result for one of the videos. Next, the individual video stacks were themselves stacked, but there is a catch -- Jupiter's rotation is so rapid that the features will not align even after a couple of minutes or more.  So enters another piece of software, WinJupos.  Each of the individual stacks -- let's call them substacks -- was entered along with the date and time.  Then WinJupos did some mathemagical image morphing and adjusted the image for each substack -- a process called de-rotation -- to as if each was taken at the same time.  The de-rotated substack images were then stacked to produce a final stacked image like that shown in Panel D.  From there, this image was processed to a completed product.  Piece of cake!  (Not really, a lot has to be learned in using the software, which is the same for all types of astrophotography, but isn't that the fun of it?)  Lastly, Ganymede happened to be visible in the original frames, so I took a composite of Ganymede from a number of frames and positioned that to the point where Ganymede was located for the frame that was used as the selected time for the de-rotated images.

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  • Final
    Jupiter and Ganymede 1-2-2024 MST, Steve Lantz
    Original
  • Jupiter and Ganymede 1-2-2024 MST, Steve Lantz
    B
  • Jupiter and Ganymede 1-2-2024 MST, Steve Lantz
    C
  • Jupiter and Ganymede 1-2-2024 MST, Steve Lantz
    D

B

Title: Typical Single Video Frame

Description: One out of the roughly 11000 video frames composited to make the final image.

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C

Title: Substack Image

Description: Sample result of stacking the best 597 images from a single video.

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D

Title: Master Stack of All Best Frames Produced by WinJupos

Description: This is the stack of the de-rotated images created by WinJupos that was processed to get the final result.

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Histogram

Jupiter and Ganymede 1-2-2024 MST, Steve Lantz