Juno Perijove 53, July 31, 2023 Options

[volcanopele]

Io flyby coming up in a couple of hours. C/A distance is 22,241 km. Will cover the same region that we've seen of late, the northern trailing hemisphere. Might see the Prometheus plume just pass the terminator in the early images.

Ground track map for this flyby and later encounters:

[StargazeInWonder]

That's excellent how the four general track locations cover different terrain. I'm sure that the resolution is not near the par of any planned dedication Io mission, but this is still a pretty solid Io mission in its own right. And the radio science and magnetometer data is also potentially excellent. This shapes up as one of the most exciting opportunistic mission extensions there's been. Just make it through 7 more orbits, Juno!

[mcaplinger]

All images have been pushed to missionjuno. Enjoy.

[Kevin Gill]

All images have been pushed to missionjuno. Enjoy.

Thanks! Here's an initial quick look at JNCE_2023212_53C00121_V01


Io - PJ53-121

[volcanopele]

The plume you've all noticed near the terminator is Prometheus...

[StargazeInWonder]

The one almost exactly at the 6 o'clock position, a bit far from the sun-lit portions, visible if you crank the brightness way up?

[Brian Swift]

PJ53_114

[volcanopele]

For the curious, currently working on a control network. Seems to need one big one for as many images I can add within reason...

[volcanopele]

First image and map complete. Other images in preparation.

[volcanopele]

Data dump time!

 PJ53_animatedgif.mp4 ( 2.96MB ) Number of downloads: 390
Not sure if this attachment will work, but this is an mp4 animation of 12 of the Io images.

Same 12 images in an image strip.

Took that previous montage and cranked up the brightness to 11 to highlight the Prometheus plume on the nightside.

[Brian Swift]

Gerald (or anyone) what did you get for start time offset on PJ53_165? I got 0.2463 second.

Also, Gerald I concur that PJ53_165 is showing an occultation of Io by Jupiter.
The following 5x enlarged image shows markings on limbs on raw data of blue filter for which occultation is most progressed.
Will be interesting to see where Jupiter limb moves after we get reconstructed SPK.

[volcanopele]

There was a new CK delivery late in the week. Not sure if that would help with limb fitting for you. I'm using ISIS's jigsaw for correcting Io's position and orientation so the exact file I use doesn't really matter...

[ngunn]

Thanks for posting these great images - I particularly enjoyed the animation sequence. I have a couple of questions about the Prometheus plume. Is it visible here because the top of it rises up into sunlight or for some other reason? Does it erupt continuously or was this sighting just a lucky chance?

[Brian Swift]

There was a new CK delivery late in the week. Not sure if that would help with limb fitting for you. I'm using ISIS's jigsaw for correcting Io's position and orientation so the exact file I use doesn't really matter...

Thanks. With the V02 CK file, time offset (from visual limb fit to Io) is only -0.01246 sec.

Scaled 5x raw data with limb markings:

[Brian Swift]

Image sequence of Io not-occulted PJ53_164, Io partially occulted by Jupiter PJ53_165, difference _165 - _164
Images scaled up ~14x.

And a 2nd version with markings where Jupiter's 1-bar limb should be and final image is Abs difference of _165 - _164.