Juno Perijove 57, December 30, 2023 Options

[volcanopele]

I haven't gotten that far yet but my best guess at this point would be Xihe.

[volcanopele]

My new favorite volcano is visible in Jupiter Shine!!!!!



this is Tonatiuh, a 500-km long lava flow that wasn't there 15 years ago, at all. This is also the site of that plume that JunoCam saw at the end of 2018.

[volcanopele]

Full set of six:



Plus a nice bonus color anaglyph

[ugordan]

Absolutely spectacular stuff, well worth the wait. Congrats to the team for pulling it off.

[Greenish]

Couldn't resist brushing off StereoPhotoMaker for a crosseye stereo pair, hope you don't mind borrowing your image (from @volcanopele on twitter before I even got here).

Somewhat tortured view but really puts it in perspective for me.

[Bjorn Jonsson]

Congratulations to the Juno team. The high quality of these images compared to PJ56 is a nice surprise to me. Even the blue images have clear details on the nightside.

[Nahúm]

Congratulations to Juno team! There seems to be some "visible" changes at Loki compared to Voyager 1 images!

[john_s]

Plus a nice bonus color anaglyph

Wow- there's real stereo information on those big mountains- nice job, Jason!

Has the camera performance actually improved since PJ56? It looks like it.

John

[Webscientist]

A captivating time in the Juno mission around Jupiter !

Regarding the mountains or volcanoes of Io, there is a remarkable shadow of a mountain or volcano in a high-resolution view of Io during that flyby. I think we can approximate the potential height of the mountain.

I took one of the images presented by Jason to evaluate the size of the topographic structure and to evaluate the potential height of the mountain or volcano.
I assume a diameter of around 1302 pixels for the disk of Io (real diameter of 3643.2 km).
From the peak of the mountain to the limit of the shadow, there is a distance of around 56 pixels (From location A to B, there is a distance of 56 pixels).
That distance of 56 pixels must represent aroud 157 km (56 pixels /1302 pixels * 3643.2 km).
If we have the angle of the Sun above the horizon from location B (location of the limit of the shadow related to the peak of the mountain), we should be in a position to approximate the potential height of that mountain that may be closer, in appearance, to "Mont Cervin" (The Matterhorn) in Switzerland than "Le Piton de la Fournaise" (Peak of the Furnace) in the island of "La Réunion" !

[fredk]

There is enough information in the image itself to determine the angular height of the sun at that peak, based on the position of the terminator. But the peak is pretty close to the terminator so the angle is quite low and will exagerate the relief considerably.

[mcaplinger]

Has the camera performance actually improved since PJ56? It looks like it.

Yes, certainly.

Buried in the Facebook comments from NASA Solar System Exploration:

After Juno's last close pass by Jupiter in November, JunoCam's performance was severely degraded by radiation damage. Using its built-in heater, the camera was warmed to a temperature of about 65C (150F) for several weeks in December, a process called "annealing", and this treatment has restored camera function, at least for this pass.

Credit to Jamie Carter at Forbes.com for actually finding that comment and reporting it.

[Bjorn Jonsson]

Has the camera performance actually improved since PJ56? It looks like it.

Yes, definitely a very large improvement since PJ56. The image quality is now probably comparable to PJ55.

This is a preliminary version of image PJ57_22:



North is up. The brightness of the nightside has been increased to show details there.

[StargazeInWonder]

Congratulations to Juno team! There seems to be some "visible" changes at Loki compared to Voyager 1 images!

There's some detail around Loki in the color that implies changes, too, although to be absolutely certain we'd have to check against differences in filters.

[StargazeInWonder]

At the hazard of gushing too much for board rules, this is just amazing stuff, way better than expected. Amazing work by the team and the citizen imagery mavens. I notice that the good stuff came out much sooner after the flyby than with P55; I was ready to chew my fingernails waiting a little longer.

Add this to the long list of tremendous opportunistic science where a mission funded for one purpose wonderfully observed another target. The Ganymede and Europa observations were very nice but this is astonishing. I look forward to learning what the radio science tells us about Io's innards.

[scalbers]

A very rough / preliminary idea of how one of volcanopele's images fits in a cylindrical map (before and after)