Juno Perijove 43, July 5, 2022 Options

[Brian Swift]

Jupiter JunoCam PJ43_31 North Pole image with night-side filled in by @OpenAI #Dalle2 via prompt
"Upper left half of image appears similar to lower right half of image and there is no noticeable diagonal discontinuity."
Upper left image is is original with night-side masked out. Other three images generated by the AI.

[ZLD]

@Brian Swift

I've always been curious what their image set list looks like. Your #2 and #4 frames look pretty remarkable and probably would largely pass unnoticed at a cursory glance.

[Brian Swift]

What sort of "relief" are we looking at here? Is there any vertical exaggeration applied to the stereo image (doubt it)? What is the scale of the base image, anyway? I just realized that I've been looking at these Juno images without having an idea of how big this is, other than BIG.

This is just two images, so no artificial vertical exaggeration. The angle between the two views is about 57º.

As for big-ness:
The circular structure in the lower-3rd right-3rd of image about 2500km across.
If you imagine the central structure as being T shaped, it is about 5500km across the top and 7000km tall.
The bright cloud patch (horizontally centered, lower 3rd of image, left of circular structure), is about 1300km long by 500km wide.

[fredk]

There are features with subtle depth visible in that stereo view - one trick to make it easier to see subtle depth is to view cross-eyed and swap L and R frames repeatedly. It's easier to see features pop a bit forwards and back each time you swap than features that are fixed either forwards or back.

Considering the frames are separated by only 5 minutes I guess differences between the two frames are dominated by the change in perspective, rather than by distortions due to differential wind across the frames.

[Bill Harris]

I've visualized these features as essentially "flat against" the top of the atmosphere-sphere. But this stereopair has a subtle depth visible. The small, white clouds are cumulus convecting high in the atmosphere with.the dark cyclonic (anticyclonic?) swirls driving deep into the atmospheric column. Certainly that has an altitude, a depth and relief.

[StargazeInWonder]

Here's Brian's work presented as a Red-Blue anaglyph. The feature that perhaps jumps out most to me is the deep "trench" to the left of the circular swirl in the lower right part of the image.

There's certainly some relief here. There's also a bit of lateral movement due to winds, I think. Zooming in and looking at different scales, this could take a while to explore.

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[Bill Harris]

Amateur astronomers have noticed an increase in activity in the Great Red Spot this week (1 August 22).
When will Juno next get the chance to view the GRS?

--Bill

[Brian Swift]

Amateur astronomers have noticed an increase in activity in the Great Red Spot this week (1 August 22).
When will Juno next get the chance to view the GRS?

Next Perijove is 8/17, however predicting visibility of GRS is above my pay grade.

[mcaplinger]

...predicting visibility of GRS is above my pay grade.

If you know the System III longitude of the GRS at a given time, its canonical SIII drift rate is +0.308 degrees/day.

A quick skim of the amateur images on missionjuno shows that the GRS was at about 300 degrees system III on 7/24/2022.

So I think the GRS will not be visible on the outbound leg of this month's PJ, which covers 130W to 200W, about.

If I did all that right.

[Bill Harris]

Thanks Brian and Mike. We'll keep an eye on it from this side of the tracks.

--Bill

[StargazeInWonder]

Looking at amateur pictures from this week, it seems that the GRS is surrounded (I would have said "encircled" but it's more of an ellipse) by a bit more of a wide band of pale clouds than usual. Is that the unusual activity? Otherwise, I don't see anything that looks out of the ordinary.

[Bill Harris]

That is the activity, and it's enough to get the Jupiter Watchers excited. I look at it as a high layer of white clouds overlying the reddish deeper cyclonic area of the GRS. Certainly not a death-nell, but I'd be interested to view it closer.

[Bill Harris]

So PJ44 did drop into the GRS:
http://www.unmannedspaceflight.com/index.p...st&p=258129

[Brian Swift]

Here's Brian's work presented as a Red-Blue anaglyph. The feature that perhaps jumps out most to me is the deep "trench" to the left of the circular swirl in the lower right part of the image.

There's certainly some relief here. There's also a bit of lateral movement due to winds, I think. Zooming in and looking at different scales, this could take a while to explore.

StargazeInWonder, can you post the anaglyph image to the https://www.missionjuno.swri.edu site, or give the the OK and I'll post it.
Thanks.

[Brian Swift]

Europlanet Science Congress presentation "Long-Baseline Observations with JunoCam",
quantitative analysis of cloud elevation based on stereoscopic images.

Abstract: https://meetingorganizer.copernicus.org/EPS...C2022-1124.html
PowerPoint Slides (Display file button on page): https://meetingorganizer.copernicus.org/EPS...n/EPSC2022-1124
Coverage at phys.org : https://phys.org/news/2022-09-3d-junocam-re...ed-cupcake.html
Space.com getting 95K+ views of Gerald's animation: https://www.youtube.com/watch?v=sqCNGf7pM9w

Gerald, will video of session be posted?