Juno Perijove 41, April 9, 2022 |
Juno Perijove 41, April 9, 2022 |
Mar 29 2022, 11:05 PM
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#1
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Member Group: Members Posts: 406 Joined: 18-September 17 Member No.: 8250 |
Very cool preview of Juno's upcoming encounters with Io from Jason Perry https://www.youtube.com/watch?v=5MtYaSteBRY
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Apr 11 2022, 08:28 PM
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#2
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Senior Member Group: Moderator Posts: 3233 Joined: 11-February 04 From: Tucson, AZ Member No.: 23 |
5th Io image using two different enlargement methods, both at 5x. Still processing. VERY quick assessment: No obvious changes since NH. -------------------- &@^^!% Jim! I'm a geologist, not a physicist!
The Gish Bar Times - A Blog all about Jupiter's Moon Io |
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Apr 11 2022, 09:51 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 |
3rd image (5x Again with nearest neighbor and bicubic smoothing):
1st image (5x Again with nearest neighbor and bicubic smoothing): -------------------- &@^^!% Jim! I'm a geologist, not a physicist!
The Gish Bar Times - A Blog all about Jupiter's Moon Io |
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Apr 12 2022, 01:49 AM
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#4
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IMG to PNG GOD Group: Moderator Posts: 2250 Joined: 19-February 04 From: Near fire and ice Member No.: 38 |
This is my version of Io image PJ41_3, enlarged by a factor of 5 relative to the original data:
The color balance is very preliminary but hopefully this is not too far from Io's true color. However, Io's color is a notoriously complicated subject and the color balance can definitely be improved. The color correction multipliers I have been using for Jupiter were obviously not correct for Io. The color multipliers I have been using for Europa worked better but probably also resulted in incorrect color so I made a quick-and-dirty, preliminary modification to them. |
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Apr 12 2022, 02:49 AM
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#5
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Senior Member Group: Moderator Posts: 3233 Joined: 11-February 04 From: Tucson, AZ Member No.: 23 |
So looking at the images, some quick assessments:
Not really seeing any major surface changes at this scale, but then again this covering areas that Galileo and New Horizons saw at poor emission angles, so some of the northern high-latitudes can be hard to judge. Seeing a few mountains along the terminator but nothing that stands out to me as a plume. There might be something near -7/26W in 41C00002, but I can't find it in the subsequent images The flows in the northern parts of Lei-Kung Fluctus might have some interesting complexity. WAY TOO early to be sure. Can't wait for PJ43! -------------------- &@^^!% Jim! I'm a geologist, not a physicist!
The Gish Bar Times - A Blog all about Jupiter's Moon Io |
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Apr 12 2022, 02:56 AM
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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 |
-------------------- &@^^!% Jim! I'm a geologist, not a physicist!
The Gish Bar Times - A Blog all about Jupiter's Moon Io |
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Apr 14 2022, 04:50 PM
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#7
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Member Group: Members Posts: 406 Joined: 18-September 17 Member No.: 8250 |
PJ40 Jupiter Images, Exaggerated Color/Contrast
Full resolution 649 Megapixel (20855-by-31159 JPEG) version available at https://www.missionjuno.swri.edu/junocam/processing?id=12954 |
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May 13 2022, 08:13 PM
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#8
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Member Group: Members Posts: 406 Joined: 18-September 17 Member No.: 8250 |
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May 13 2022, 08:35 PM
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#9
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Member Group: Members Posts: 699 Joined: 3-December 04 From: Boulder, Colorado, USA Member No.: 117 |
Hmm- that looks like a moderately convincing plume to me.
John |
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May 13 2022, 09:13 PM
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#10
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Senior Member Group: Moderator Posts: 3233 Joined: 11-February 04 From: Tucson, AZ Member No.: 23 |
Not super convinced from this set of images, no. The location of this spot isn't consistent from one image to the next and in cases where it should be there, it isn't. It might be a plume, but I would only consider it a suspected one at this point. If it is real, it might be associated with E Kanehekili (17S/22.3W), a new eruption site that started up in February 2019.
-------------------- &@^^!% Jim! I'm a geologist, not a physicist!
The Gish Bar Times - A Blog all about Jupiter's Moon Io |
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May 13 2022, 11:40 PM
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#11
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Member Group: Members Posts: 406 Joined: 18-September 17 Member No.: 8250 |
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May 14 2022, 11:27 PM
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#12
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Member Group: Members Posts: 406 Joined: 18-September 17 Member No.: 8250 |
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May 16 2022, 10:30 PM
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#13
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Member Group: Members Posts: 406 Joined: 18-September 17 Member No.: 8250 |
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Dec 23 2022, 04:21 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 |
As promised in the PJ43 thread, here are the L and M-band images from PJ41. So a few notes about these as I don’t think I’ve really posted them here before.
These are summed images. I reproject each L and M frame to the same geometry (after using limb fits to correct for slight navigational mismatches with SPICE) then average all the frames together. This can slightly improve the apparent resolution of the image as well as improve the signal to noise ratio, making fainter hotspots easier to spot. Most powerful hotspot (accounting for emission angle) was Loki, but only in the M band. Barely visible in L band, which suggests that its surface was actually relatively cool during this flyby. Brightest single pixel was in Vivasvant. 100 of the ~250 hotspots detected so far by JIRAM are visible in the M band. L-band M-band Stretching the M-band image to show details in Loki (can make out the horseshoe shape of Loki) Color composite of L and M bands -------------------- &@^^!% Jim! I'm a geologist, not a physicist!
The Gish Bar Times - A Blog all about Jupiter's Moon Io |
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