Juno Perijove 36, September 3, 2021 |
Juno Perijove 36, September 3, 2021 |
Sep 4 2021, 08:05 AM
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#1
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Member Group: Members Posts: 411 Joined: 18-September 17 Member No.: 8250 |
PJ36 data showed up about 1:14 pm.
16-bit PNG version at at https://www.missionjuno.swri.edu/junocam/processing?id=11285 |
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Sep 8 2021, 07:56 PM
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#2
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Member Group: Members Posts: 411 Joined: 18-September 17 Member No.: 8250 |
PJ36_43 full spin Jupiter and Io (with poor color alignment) image.
Mike, so really no way to get 84 frames from a full spin image? |
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Sep 8 2021, 09:44 PM
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#3
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Senior Member Group: Members Posts: 2517 Joined: 13-September 05 Member No.: 497 |
Mike, so really no way to get 84 frames from a full spin image? Sure, it's easy. We only do it this way to irritate you personally. -------------------- Disclaimer: This post is based on public information only. Any opinions are my own.
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Sep 8 2021, 10:48 PM
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#4
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Member Group: Members Posts: 411 Joined: 18-September 17 Member No.: 8250 |
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Sep 9 2021, 12:20 AM
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#5
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Senior Member Group: Members Posts: 2517 Joined: 13-September 05 Member No.: 497 |
Mike, so really no way to get 84 frames from a full spin image? Seriously, it's not trivial because of some timing limitations. We only took this image for Io, though I question if there was much point given the range. It does seem like Murphy's law always splits the image across the planet, we've had that problem since Earth flyby. Maybe there is some systematics in the spin phase we have never learned about. -------------------- Disclaimer: This post is based on public information only. Any opinions are my own.
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Sep 9 2021, 03:29 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 |
I guess there is always the off chance you might catch a plume. Looking at the geometry, Chalybes is at the limb, but even if it were active, plumes on the limb are just about at the limit of JunoCAM's capabilities at this distance (346,000 km). Plumes JUST past the terminator are JunoCAM's best bet but there just weren't any good sources during this opportunity.
-------------------- &@^^!% 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 11 2021, 02:43 PM
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#7
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IMG to PNG GOD Group: Moderator Posts: 2251 Joined: 19-February 04 From: Near fire and ice Member No.: 38 |
This is processed from image PJ36_40, approximately true color/contrast and enhanced versions. North is to the left.
Apparently the images continue to get slightly redder. For PJ36 I am correcting the color by multiplying R/G/B with 1.0, 1.285 and 3.12 whereas for PJ35 I ended up using 1.0, 1.27 and 3.08. |
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Sep 15 2021, 05:17 PM
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#8
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Senior Member Group: Members Posts: 2921 Joined: 14-February 06 From: Very close to the Pyrénées Mountains (France) Member No.: 682 |
Don’t know where to post this but sew 2 days ago the info. For exemple here :https://www.forbes.com/sites/ericmack/2021/09/14/jupiter-seems-to-have-just-been-smacked-by-something-pretty-big/?sh=7ff452ce2edf
So a hit occurred on Sept 13th and wondering if Juno could get a glimpse of remanant traces… -------------------- |
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Sep 15 2021, 06:08 PM
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#9
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Senior Member Group: Members Posts: 2517 Joined: 13-September 05 Member No.: 497 |
So a hit occurred on Sept 13th and wondering if Juno could get a glimpse of remanant traces… I haven't seen anything about this from a better source than Forbes, anyone else? Juno is really too far from Jupiter now to get useful data, so it won't be until the next pass on 16 October. Not sure if that longitude will be well seen. -------------------- Disclaimer: This post is based on public information only. Any opinions are my own.
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Sep 15 2021, 06:15 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 |
From Sky and Telescope:
https://skyandtelescope.org/astronomy-news/...ash-at-jupiter/ Article has information about the location of the impact: "Pereira captured the flash at latitude –5.5° and longitude 105.7° (System I / L1), 83.3° (System II / L2), and 273.4° (System III / L3)" -------------------- &@^^!% 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 15 2021, 06:57 PM
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#11
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Senior Member Group: Members Posts: 2517 Joined: 13-September 05 Member No.: 497 |
"Pereira captured the flash at latitude –5.5° and longitude 105.7° (System I / L1), 83.3° (System II / L2), and 273.4° (System III / L3)" Here's the Cosmographia view for the next PJ, but I'm not sure what longitude system it displays, and the whole E/W thing versus what S&T reports... -------------------- Disclaimer: This post is based on public information only. Any opinions are my own.
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Sep 15 2021, 09:49 PM
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#12
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Senior Member Group: Members Posts: 2530 Joined: 20-April 05 Member No.: 321 |
Here's a thread on CloudyNights about it:
https://www.cloudynights.com/topic/789064-c...act-on-jupiter/ Damian Peach obtained a really nice ground-based image hours later that showed no sign of the impact. https://twitter.com/peachastro/status/1437834143350628358 |
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Sep 16 2021, 04:45 PM
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#13
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Senior Member Group: Members Posts: 2517 Joined: 13-September 05 Member No.: 497 |
I'm not sure what longitude system it displays, and the whole E/W thing versus what S&T reports... If I assume that all the numbers from S&T are degrees west (which seems to be the standard amateur convention, very reasonable) and Cosmographia is displaying System III longitudes (which is the standard NAIF convention, I believe) then the next PJ will be on the opposite side of the planet from this event, unfortunately. -------------------- Disclaimer: This post is based on public information only. Any opinions are my own.
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Sep 17 2021, 04:59 PM
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#14
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Senior Member Group: Members Posts: 2998 Joined: 30-October 04 Member No.: 105 |
Although the next Perijove will be on the other side from this impact point, i wonder if a disturbance could not drift along the Zone over the next Earth month (and many Jovian days) and be seen at that Perijove.
We'll see what we see in October. --Bill -------------------- |
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Sep 17 2021, 05:26 PM
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#15
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Senior Member Group: Members Posts: 2530 Joined: 20-April 05 Member No.: 321 |
I suppose the problem is that we also would have to recognize the disturbance against the locally chaotic clouds, and we already know that the Damian Peach image showed nothing at that resolution. Obviously, Juno offers much better resolution, but now we know that whatever we might be looking for is going to be pretty subtle and also of unknown specific appearance.
This is a little like someone telling you they lost something on the beach and you're looking for it without knowing what it is. Even if you find something, what you find might not be it. |
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