Juno perijove 8, September 1, 2017 |
Juno perijove 8, September 1, 2017 |
Sep 5 2017, 02:11 PM
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#31
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Member Group: Members Posts: 923 Joined: 10-November 15 Member No.: 7837 |
Wow Gerald...just fantastic. I'm rolling up my sleeves...
Isn't that artifact a moon shadow? Looks like it! *update* You figured it out! -------------------- |
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Sep 5 2017, 08:14 PM
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#32
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Newbie Group: Members Posts: 7 Joined: 12-July 17 Member No.: 8200 |
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Sep 6 2017, 01:00 AM
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#33
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Senior Member Group: Members Posts: 2504 Joined: 13-September 05 Member No.: 497 |
BTW, note that image 114 ("Collision of colours"/"Sharp edge") was taken in lossless compression mode; several people had asked if images near PJ were being degraded by lossy compression. I'd be curious to hear if people thought it made a significant difference.
-------------------- Disclaimer: This post is based on public information only. Any opinions are my own.
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Sep 6 2017, 02:58 AM
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#34
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Newbie Group: Members Posts: 1 Joined: 19-August 17 Member No.: 8227 |
I’m astonished by your work gerald, here is a quick edit I made earlier tonight. Enjoy!
Link to full res |
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Sep 6 2017, 03:25 AM
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#35
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Senior Member Group: Members Posts: 1578 Joined: 14-October 05 From: Vermont Member No.: 530 |
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Sep 6 2017, 12:56 PM
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#36
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Senior Member Group: Members Posts: 2346 Joined: 7-December 12 Member No.: 6780 |
BTW, note that image 114 ("Collision of colours"/"Sharp edge") was taken in lossless compression mode; several people had asked if images near PJ were being degraded by lossy compression. I'd be curious to hear if people thought it made a significant difference. I'm among these people, and this is why: Both processed in a similar way, hipassed and stretched linearly. Some scientifically interesting features are about the same size as the DCT artifacts. But I'm aware of the limited storage. So, we need to make a decision between coverage and subtle detail. @Gabriel: Wonderful! And also Johann Guillon: I'm learning, that there is always space for improvements. With each round we are going to be a little better. |
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Sep 6 2017, 03:28 PM
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#37
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Member Group: Members Posts: 923 Joined: 10-November 15 Member No.: 7837 |
Here is a 19 frame PJ08 sequence based on Gerald's source...
11 Megapixel 43 Megapixel 173 Megapixel 693 Megapixel -------------------- |
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Sep 6 2017, 03:50 PM
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#38
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Senior Member Group: Members Posts: 2530 Joined: 20-April 05 Member No.: 321 |
What this helped me realize is that the programs I use to generate moon location predictions do not include Amalthea. The big ~7 of Saturn and big 5 of Uranus are pretty standard, but the Jupiter ephemeris programs I use all include the Galileans and nothing else. But I found this one:
https://pds-rings.seti.org And here is the simulated view during the last Juno encounter. Amalthea is dead center. It's the culprit. Also, the smaller moons would not cover the Sun as seen from Jupiter, and therefore wouldn't generate an umbra, only a penumbra. Amalthea doesn't cover it completely, either. The day after the eclipse, someone asked me if there are any other cases of moons that just cover the Sun as seen from their planet, and there are some close candidates, Callisto being the closest, but none (known) so close as the Moon seen from Earth. This also helped me realize that Thebe is pretty big – almost half the size of Amalthea. Metis and Adrastea are much smaller. |
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Sep 6 2017, 04:33 PM
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#39
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Newbie Group: Members Posts: 7 Joined: 12-July 17 Member No.: 8200 |
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Sep 7 2017, 02:01 PM
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#40
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Member Group: Members Posts: 923 Joined: 10-November 15 Member No.: 7837 |
-------------------- |
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Sep 7 2017, 08:47 PM
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#41
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Interplanetary Dumpster Diver Group: Admin Posts: 4404 Joined: 17-February 04 From: Powell, TN Member No.: 33 |
Just beautiful ! Can't wait to watch whether we've got to see Io this time. Yes, we got a nice peek at Io. -------------------- |
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Sep 7 2017, 09:03 PM
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#42
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Member Group: Members Posts: 655 Joined: 22-January 06 Member No.: 655 |
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Sep 7 2017, 09:15 PM
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#43
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Member Group: Members Posts: 923 Joined: 10-November 15 Member No.: 7837 |
Thankee.
Here is a portrait of PJ08_124 using Gerald's source... Upscaled to 36 Megapixel & processed. Here is a processed detail from PJ08_110... -------------------- |
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Sep 8 2017, 12:00 AM
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#44
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Senior Member Group: Members Posts: 2530 Joined: 20-April 05 Member No.: 321 |
I don't know when we got conclusive evidence that we are seeing relief in the cloud shadows, but we definitely have by now. Little storm heads all over the place.
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Sep 8 2017, 04:19 PM
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#45
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Solar System Cartographer Group: Members Posts: 10127 Joined: 5-April 05 From: Canada Member No.: 227 |
Great pictures everyone!
I can't be absolutely certain yet, but I think these are the features we are seeing in the Io image: (strictly speaking we are seeing large albedo features around those paterae, not the paterae themselves) Large changes in surface features might be detectable if this is compared with older images. Phil -------------------- ... because the Solar System ain't gonna map itself.
Also to be found posting similar content on https://mastodon.social/@PhilStooke NOTE: everything created by me which I post on UMSF is considered to be in the public domain (NOT CC, public domain) |
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