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Juno perijove 8, September 1, 2017
Sean
post Sep 5 2017, 02:11 PM
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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! smile.gif


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Johann Guillon
post Sep 5 2017, 08:14 PM
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Hi everybody,

here's my contribution for this flyby.

To little guys salute us.

Awesome job Gerald, as always. Thank you !
Attached thumbnail(s)
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mcaplinger
post Sep 6 2017, 01:00 AM
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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.


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Disclaimer: This post is based on public information only. Any opinions are my own.
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Gabriel
post Sep 6 2017, 02:58 AM
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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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stevesliva
post Sep 6 2017, 03:25 AM
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QUOTE (Johann Guillon @ Sep 5 2017, 04:14 PM) *
here's my contribution for this flyby.


These colors seem... right. Familiar? nicely done.
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Gerald
post Sep 6 2017, 12:56 PM
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QUOTE (mcaplinger @ Sep 6 2017, 03:00 AM) *
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:
Attached Image

Attached Image

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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Sean
post Sep 6 2017, 03:28 PM
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Here is a 19 frame PJ08 sequence based on Gerald's source...

11 Megapixel


43 Megapixel

173 Megapixel

693 Megapixel




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JRehling
post Sep 6 2017, 03:50 PM
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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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Johann Guillon
post Sep 6 2017, 04:33 PM
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QUOTE (stevesliva @ Sep 6 2017, 04:25 AM) *
These colors seem... right. Familiar? nicely done.


I try to make what I saw through my telescope. Maybe little bit more sharp and detailed smile.gif

Thank you !
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Sean
post Sep 7 2017, 02:01 PM
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Updated process with Gerald's source... PJ08_121



(repaired the cropped limb)

*update*

8k version






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tedstryk
post Sep 7 2017, 08:47 PM
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QUOTE (climber @ Sep 5 2017, 01:31 PM) *
Just beautiful !
Can't wait to watch whether we've got to see Io this time.


Yes, we got a nice peek at Io.

Attached Image


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jasedm
post Sep 7 2017, 09:03 PM
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QUOTE (Sean @ Sep 7 2017, 03:01 PM) *
Updated process with Gerald's source... PJ08_121


Absolutely wonderful. These images from Jupiter are simply astonishing.
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Sean
post Sep 7 2017, 09:15 PM
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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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JRehling
post Sep 8 2017, 12:00 AM
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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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Phil Stooke
post Sep 8 2017, 04:19 PM
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Great pictures everyone!

I can't be absolutely certain yet, but I think these are the features we are seeing in the Io image:

Attached 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


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... because the Solar System ain't gonna map itself.
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