Juno Perijove 58, February 3, 2024 Options

[volcanopele]

The resolution will roughly match JNCE_2023364_57C00023_V01, so the second of the images from the last encounter, and at a similar emission angle, but at higher phase angles (110° vs 90°). JNCE_2023364_57C00022_V01 had better pixel scale at Loki, but at a higher emission angle.

[mcaplinger]

Apparently there is going to be a live event with Q&A starting at 9:30 PST tomorrow (2/3) at https://twitch.tv/nasa if that's of interest.

I don't expect the data to be on missionjuno until sometime Monday 2/5, though I have been wrong about this before. There may be some pre-C-kernel images out earlier on social media.

[volcanopele]

Thanks for the heads up Mike. I did let me D&D group know that I might be busy Sunday evening just in case... My legally distinct "Han Solo" character can sit out a session.

[volcanopele]

Full images aren't up yet, but the green filter of one of the crescent sunlit images is now available:



Reflective Loki! the Xihe plume! Jupiter Shine!

[StargazeInWonder]

Here's an effort to align the Loki imagery in green from PJ57 and that first green frame PJ58, to emphasize the specular effects.

This brings back memories of the specular glint seen off Titan's lakes.

Attached image(s)

 

[volcanopele]

BTW, not the first time we’ve seen specular reflection at Loki:

[Bjorn Jonsson]

Wow! This is a beautiful image of Loki, far more so than the I32 Galileo image. And I think there are even some topographic shadows visible at Loki, the best example I can remember of this in images showing Loki.

And the great thing is also that this image implies that the Io flyby was a success (at least for JunoCam). No 'PJ56-like' problems.

[john_s]

New Horizons also got a nice view of strong specular reflection from Loki (red arrow in the attached) at 150 degree phase, albeit at low resolution. The blue arrow points out that the bright deposits around Ra Patera are also very forward scattering.

John

[mcaplinger]

Io images are up on missionjuno now. https://www.missionjuno.swri.edu/junocam/processing

[volcanopele]

First pair of images complete:

[Brian Swift]

PJ58_24 closest approach image from 1499.3 km altitude.
Nightside of Io illuminated by Jupiter-shine.
Needs some cleanup, but not too bad.

[StargazeInWonder]

Wow, the specular effects at Loki vary tremendously between those two images. This flyby is going to provide some unique, perhaps definitive, information about the reflectance of Io's surface.

The Jupitershine imagery is also great.

The only thing mitigating the pure surprise is that PJ57 was already so good, but this adds tremendously.

[volcanopele]

First attempt at the second Jupiter shine image. Need to work on the control network a bit more on this one so this is a first draft.

[Brian Swift]

PJ58_25, altitude 2493.8 km, Jupiter-shine illuminated.

[Brian Swift]

PJ58_25 again, stretched, to bring out hint of plume in upper left.