Juno Perijove 55, October 15, 2023 |
Juno Perijove 55, October 15, 2023 |
Sep 29 2023, 06:09 PM
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#1
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Senior Member Group: Moderator Posts: 3233 Joined: 11-February 04 From: Tucson, AZ Member No.: 23 |
Finished up a set of preview images for this encounter:
https://pirlwww.lpl.arizona.edu/~perry/Juno/pj55.htm This uses the PJ53 images as a template for image timing, so images every 3 minutes ±10 minutes of C/A then wider spacing outside of that. Juno is oriented so that is off nadir so it does a better job of keeping Io in the middle of the JunoCam FOV (and JIRAM centered on Io as well, which is great as the drift near C/A can lead to only a few images being taken making summed images have poorer quality). -------------------- &@^^!% Jim! I'm a geologist, not a physicist!
The Gish Bar Times - A Blog all about Jupiter's Moon Io |
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Sep 29 2023, 07:30 PM
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#2
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Member Group: Members Posts: 227 Joined: 13-October 09 From: Olympus Mons Member No.: 4972 |
This will be the first of 4 flybys that will definitely improve mapping of Io.
-------------------- "Thats no moon... IT'S A TRAP!"
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Sep 29 2023, 08:44 PM
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#3
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Senior Member Group: Moderator Posts: 3233 Joined: 11-February 04 From: Tucson, AZ Member No.: 23 |
Pj53 already helped north of ~65N, particularly with mapping where mountains are.
-------------------- &@^^!% Jim! I'm a geologist, not a physicist!
The Gish Bar Times - A Blog all about Jupiter's Moon Io |
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Oct 11 2023, 02:38 AM
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#4
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Senior Member Group: Moderator Posts: 3233 Joined: 11-February 04 From: Tucson, AZ Member No.: 23 |
-------------------- &@^^!% Jim! I'm a geologist, not a physicist!
The Gish Bar Times - A Blog all about Jupiter's Moon Io |
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Oct 11 2023, 05:11 AM
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#5
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Senior Member Group: Members Posts: 1276 Joined: 25-November 04 Member No.: 114 |
I didn't know about Juno's orbit possibly being changed. That is fascinating.
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Oct 11 2023, 04:20 PM
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#6
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Senior Member Group: Moderator Posts: 3233 Joined: 11-February 04 From: Tucson, AZ Member No.: 23 |
Scott Bolton mentioned it at OPAG back in May and the dates and distances come from that presentation. That change hasn't shown up in the form of a new reference trajectory, so I don't know what the status of that orbit change.
-------------------- &@^^!% Jim! I'm a geologist, not a physicist!
The Gish Bar Times - A Blog all about Jupiter's Moon Io |
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Oct 12 2023, 03:49 AM
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#7
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Member Group: Members Posts: 411 Joined: 18-September 17 Member No.: 8250 |
Finished up my preview video for PJ55: https://youtu.be/bYP9G8fWRO0?si=ae57n3eA99kIyxVt Very nice. What software are you using for the animation. |
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Oct 12 2023, 03:34 PM
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#8
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Senior Member Group: Moderator Posts: 3233 Joined: 11-February 04 From: Tucson, AZ Member No.: 23 |
I use Cosmographia from NAIF: https://naif.jpl.nasa.gov/naif/cosmographia.html . I have a custom add-on for Juno that uses all the latest kernels and has footprints for JIRAM, JunoCam, and the SRU. I've attached a zip file of it here, but note that you still need to gather up all the necessary kernels. I've also attached a txt file copy of my meta kernel so you can see what ones you need to download.
For actually creating the video, I used Final Cut Pro, but I suspect you were asking more about the visualization tool.
Attached File(s)
-------------------- &@^^!% Jim! I'm a geologist, not a physicist!
The Gish Bar Times - A Blog all about Jupiter's Moon Io |
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Oct 16 2023, 01:21 AM
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#9
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Member Group: Members Posts: 890 Joined: 18-November 08 Member No.: 4489 |
[quote name='volcanopele' date='Oct 12 2023, 11:34 AM' post='261936']
I use Cosmographia from NAIF: i do the same but use celestia with a ton of kernels . My ssc file for the spacecraft is getting a bit long and the folder is 4.9 Gig in size |
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Oct 16 2023, 04:05 PM
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#10
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Senior Member Group: Members Posts: 1276 Joined: 25-November 04 Member No.: 114 |
Was flyby successful?
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Oct 16 2023, 05:31 PM
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#11
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Senior Member Group: Moderator Posts: 3233 Joined: 11-February 04 From: Tucson, AZ Member No.: 23 |
So far so good. reconstructed c-kernel dropped about 30 minutes ago.
-------------------- &@^^!% Jim! I'm a geologist, not a physicist!
The Gish Bar Times - A Blog all about Jupiter's Moon Io |
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Oct 16 2023, 08:50 PM
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#12
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Member Group: Members Posts: 411 Joined: 18-September 17 Member No.: 8250 |
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Oct 16 2023, 09:47 PM
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#13
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Member Group: Members Posts: 411 Joined: 18-September 17 Member No.: 8250 |
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Oct 16 2023, 10:04 PM
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#14
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Senior Member Group: Moderator Posts: 3233 Joined: 11-February 04 From: Tucson, AZ Member No.: 23 |
-------------------- &@^^!% Jim! I'm a geologist, not a physicist!
The Gish Bar Times - A Blog all about Jupiter's Moon Io |
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Oct 16 2023, 11:21 PM
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#15
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Member Group: Members Posts: 411 Joined: 18-September 17 Member No.: 8250 |
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Oct 16 2023, 11:50 PM
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#16
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Member Group: Members Posts: 411 Joined: 18-September 17 Member No.: 8250 |
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Oct 17 2023, 12:47 AM
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#17
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Senior Member Group: Moderator Posts: 3233 Joined: 11-February 04 From: Tucson, AZ Member No.: 23 |
Yep,
Nope, It's Volund! -------------------- &@^^!% Jim! I'm a geologist, not a physicist!
The Gish Bar Times - A Blog all about Jupiter's Moon Io |
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Oct 17 2023, 06:27 AM
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#18
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Senior Member Group: Moderator Posts: 3233 Joined: 11-February 04 From: Tucson, AZ Member No.: 23 |
-------------------- &@^^!% Jim! I'm a geologist, not a physicist!
The Gish Bar Times - A Blog all about Jupiter's Moon Io |
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Oct 17 2023, 03:02 PM
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#19
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Member Group: Members Posts: 411 Joined: 18-September 17 Member No.: 8250 |
PJ55 Io Initial downlink images overview, normal-ish color/contrast
Full resolution PNG at https://www.missionjuno.swri.edu/junocam/processing?id=15605 |
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Oct 17 2023, 08:19 PM
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#20
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Senior Member Group: Moderator Posts: 3233 Joined: 11-February 04 From: Tucson, AZ Member No.: 23 |
Final montage of 15 images. There are 4 others, 2 at the start and end but their resolution is much lower and don't really add much to the coverage. -------------------- &@^^!% Jim! I'm a geologist, not a physicist!
The Gish Bar Times - A Blog all about Jupiter's Moon Io |
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Oct 18 2023, 04:06 PM
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#21
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Member Group: Members Posts: 444 Joined: 1-July 05 From: New York City Member No.: 424 |
I'm thinking back to the time about 15 years ago when the informed expectation for images of Io was about 9 pixels for the entire image.
Of course no one back then was anticipating the trajectory modifications required by the longer orbit and extended mission timeline. |
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Oct 18 2023, 05:03 PM
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#22
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Senior Member Group: Members Posts: 1276 Joined: 25-November 04 Member No.: 114 |
I'm thinking back to the time about 15 years ago when the informed expectation for images of Io was about 9 pixels for the entire image. Of course no one back then was anticipating the trajectory modifications required by the longer orbit and extended mission timeline. Makes me wonder if orbit insertion error helped these flybys happen? |
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Oct 18 2023, 08:23 PM
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#23
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Senior Member Group: Members Posts: 2086 Joined: 13-February 10 From: Ontario Member No.: 5221 |
The original trajectory would have flown through the radiation belts much more often. How much instruments would have degraded by now is hard to say (but it's definitely serendipitous!)
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Oct 18 2023, 09:34 PM
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#24
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Member Group: Members Posts: 233 Joined: 14-January 22 Member No.: 9140 |
Funny, because the success of this flyby led me to muse over an impractical hypothetical scenario where the Galileo Orbiter, in response to its antenna issues, was put into a "parking" orbit with minimal radiation belt flybys until a relay orbiter could be flown out to join it and let the mission resume with the combination of Galileo's instruments and high-throughput data transfer. I'm sure that that would have been wildly impractical, but this phase of Juno's mission has just a touch of the spirit of that. We now have the data throughput asset that Galileo lacked.
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Oct 18 2023, 09:39 PM
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#25
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Senior Member Group: Members Posts: 2517 Joined: 13-September 05 Member No.: 497 |
The original trajectory would have flown through the radiation belts much more often. But it would have taken data much more frequently near Jupiter, so even though the mission has been a lot longer, the amount of science data is more or less the same. Satellite encounters notwithstanding. -------------------- Disclaimer: This post is based on public information only. Any opinions are my own.
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Oct 20 2023, 09:51 PM
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#26
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Senior Member Group: Moderator Posts: 3233 Joined: 11-February 04 From: Tucson, AZ Member No.: 23 |
-------------------- &@^^!% Jim! I'm a geologist, not a physicist!
The Gish Bar Times - A Blog all about Jupiter's Moon Io |
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Oct 24 2023, 11:50 PM
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#27
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IMG to PNG GOD Group: Moderator Posts: 2251 Joined: 19-February 04 From: Near fire and ice Member No.: 38 |
My version of the PJ55_29 image:
As mentioned in previous posts, a volcanic plume is visible near the limb at lower right in the PJ55_29 image. Here its brightness has been greatly exaggerated relative to other parts of the image. North is up and this image is enlarged by a factor of 3 relative to the original, raw data. |
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Oct 25 2023, 01:06 AM
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#28
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Senior Member Group: Moderator Posts: 3233 Joined: 11-February 04 From: Tucson, AZ Member No.: 23 |
That plume is Prometheus, also seen on PJ53.
-------------------- &@^^!% Jim! I'm a geologist, not a physicist!
The Gish Bar Times - A Blog all about Jupiter's Moon Io |
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