Juno Perijove 57, December 30, 2023 |
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Juno Perijove 57, December 30, 2023 |
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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 ![]() |
I know the first close Io flyby is still a couple of months away but I'm going to go ahead and start up the topic now with a few preview images that the global map from PJ55 into the pixel scale, lighting conditions, and orientation of the highest resolution images that JunoCam would take (illuminated by the sun, there's always a chance for Jupiter-shine images), based on the current reference spk and c-kernel:
This also assumes an image cadence of 1 every other rotation (so 1 per minute). info about the encounter: CODE Perijove Date (UTC) SC Altitude (Io, km) SC Latitude (Io IAU, deg) SC W Longitude (Io IAU, deg) Vinf (Io, km/s) Phase Angle Magnetic Latitude of Io (Jupiter System III, deg) E Longitude of Io (Jupiter System III, deg) True Anomaly of Io (deg) Separation Angle
PJ57 12/30/2023 08:36:00.681 1500.021 63.694 94.641 30.047 108.885 3.418 228.269 248.805 21.175 -------------------- &@^^!% Jim! I'm a geologist, not a physicist!
The Gish Bar Times - A Blog all about Jupiter's Moon Io |
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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 ![]() |
Edited to include the first six instead of the first and third (skipped one) using the global map I generated from PJ55 images.
-------------------- &@^^!% Jim! I'm a geologist, not a physicist!
The Gish Bar Times - A Blog all about Jupiter's Moon Io |
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#3
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![]() Member ![]() ![]() ![]() Group: Members Posts: 227 Joined: 13-October 09 From: Olympus Mons Member No.: 4972 ![]() |
Will this flyby get an entry on the Gish Bar Times?
-------------------- "Thats no moon... IT'S A TRAP!"
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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 ![]() |
at this point, probably not (grumble grumble prior publication). That being said, I've considered doing a follow-up video for Youtube and might do some live events for the flyby and stream my processing work.
-------------------- &@^^!% Jim! I'm a geologist, not a physicist!
The Gish Bar Times - A Blog all about Jupiter's Moon Io |
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#5
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Senior Member ![]() ![]() ![]() ![]() Group: Members Posts: 1276 Joined: 25-November 04 Member No.: 114 ![]() |
Very excited to see any changes at Loki.
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#6
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![]() Member ![]() ![]() ![]() Group: Members Posts: 444 Joined: 1-July 05 From: New York City Member No.: 424 ![]() |
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#7
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![]() Senior Member ![]() ![]() ![]() ![]() Group: Members Posts: 2085 Joined: 13-February 10 From: Ontario Member No.: 5221 ![]() |
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#8
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Member ![]() ![]() ![]() Group: Members Posts: 233 Joined: 14-January 22 Member No.: 9140 ![]() |
The next two flybys will be close enough that Doppler radio science is expected/hoped to provide meaningful science regarding Io's interior. The Galileo Orbiter made several flybys even closer than this; I am unsure what, if any, benefits may be obtained as a result of superior technology or differences between the geometry of these flybys and those made by Galileo.
The combination of PJ55 and the next three close Io flybys will provide something approaching global coverage at about the resolution of PJ55 or better. So all told, it's going to be a pretty nice dataset given that the surface of this world changes over time and the last detailed imagery of many areas is ~20-25 years old. |
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#9
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![]() Member ![]() ![]() ![]() Group: Members Posts: 700 Joined: 3-December 04 From: Boulder, Colorado, USA Member No.: 117 ![]() |
I've heard that the Juno gravity data will have higher precision than the Galileo data, so a couple of close Juno flybys will provide a considerable improvement in understanding Io's gravity, beyond the half-dozen flybys that Galileo accomplished.
John |
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#10
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Senior Member ![]() ![]() ![]() ![]() Group: Members Posts: 2517 Joined: 13-September 05 Member No.: 497 ![]() |
We're less than a week out from the Io flyby. The first Junocam image should be taken at 2023-364T08:37:21 +/- 15s and the first four images are at 60s spacing.
-------------------- Disclaimer: This post is based on public information only. Any opinions are my own.
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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 ![]() |
Preview images using the latest ephemeris and c-kernel. First image according to that kernel has the green frame centered on Io at 2023-Dec-30 08:37:07.177. Preview images are spaced every 2 rotations.
I take it that there are not images prior to C/A/ Looked like there might be some decent imaging at ~19 km/pixel of the anti-Jovian hemisphere. A bit disappointed at the lack of Jupiter-shine images but given what happened in PJ56 I totally understand. -------------------- &@^^!% Jim! I'm a geologist, not a physicist!
The Gish Bar Times - A Blog all about Jupiter's Moon Io |
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#12
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Senior Member ![]() ![]() ![]() ![]() Group: Members Posts: 2517 Joined: 13-September 05 Member No.: 497 ![]() |
I take it that there are not images prior to C/A Correct. Maybe we should have taken one, but Io starts leaving the FOV illuminated limb first by the time the resolution has gotten decent, so we judged it wasn't worth it. -------------------- Disclaimer: This post is based on public information only. Any opinions are my own.
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#13
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![]() Member ![]() ![]() ![]() Group: Members Posts: 227 Joined: 13-October 09 From: Olympus Mons Member No.: 4972 ![]() |
Would have been cool to test if there was airglow from the volcanoes. Will the SRU be taking pictures of the night side?
-------------------- "Thats no moon... IT'S A TRAP!"
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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 ![]() |
They can take one. I'm hoping they can get one showing Tonatiuh, a large lava flow (~500 km long) north of Zal that formed between 2008 and 2018 (between first ground based detection of a hotspot to a 150-km shifting of the flow front in 2018). Kinda difficult given the longitude (~65-85°W) but even something just showing the general morphology of the flow would be useful enough. For example, I'm pretty sure that the eastern end is the source based on ground-based data, but there are no visible edifices at that end in older imagery. There is one toward the western end in Galileo imagery, and maybe the "western expansion" in 2018 was just a fresh, westward flow from that source.
-------------------- &@^^!% Jim! I'm a geologist, not a physicist!
The Gish Bar Times - A Blog all about Jupiter's Moon Io |
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#15
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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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