Juno Perijove 57, December 30, 2023 |
Juno Perijove 57, December 30, 2023 |
Oct 19 2023, 09:08 PM
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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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Oct 23 2023, 01:39 AM
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Member Group: Members Posts: 444 Joined: 1-July 05 From: New York City Member No.: 424 |
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Oct 23 2023, 03:34 AM
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Senior Member Group: Members Posts: 2087 Joined: 13-February 10 From: Ontario Member No.: 5221 |
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Oct 23 2023, 04:51 AM
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Member Group: Members Posts: 234 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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Oct 23 2023, 05:33 PM
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Member Group: Members Posts: 701 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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