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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Dec 31 2023, 06:17 AM
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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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Dec 31 2023, 02:48 PM
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Member Group: Members Posts: 701 Joined: 3-December 04 From: Boulder, Colorado, USA Member No.: 117 |
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Dec 31 2023, 03:29 PM
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Junior Member Group: Members Posts: 98 Joined: 30-November 05 From: Antibes, France Member No.: 594 |
A captivating time in the Juno mission around Jupiter !
Regarding the mountains or volcanoes of Io, there is a remarkable shadow of a mountain or volcano in a high-resolution view of Io during that flyby. I think we can approximate the potential height of the mountain. I took one of the images presented by Jason to evaluate the size of the topographic structure and to evaluate the potential height of the mountain or volcano. I assume a diameter of around 1302 pixels for the disk of Io (real diameter of 3643.2 km). From the peak of the mountain to the limit of the shadow, there is a distance of around 56 pixels (From location A to B, there is a distance of 56 pixels). That distance of 56 pixels must represent aroud 157 km (56 pixels /1302 pixels * 3643.2 km). If we have the angle of the Sun above the horizon from location B (location of the limit of the shadow related to the peak of the mountain), we should be in a position to approximate the potential height of that mountain that may be closer, in appearance, to "Mont Cervin" (The Matterhorn) in Switzerland than "Le Piton de la Fournaise" (Peak of the Furnace) in the island of "La Réunion" ! |
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