Juno Extended Mission, Perijove 34-76 |
Juno Extended Mission, Perijove 34-76 |
Sep 2 2020, 08:05 PM
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Senior Member Group: Moderator Posts: 3241 Joined: 11-February 04 From: Tucson, AZ Member No.: 23 |
At today's Outer Planet Assessment Group (OPAG) meeting, Scott Bolton gave a presentation on Juno, providing an update on the mission and providing more information on its extended mission proposal. The proposal has been sent to NASA and they expect a final decision later this year.
The proposed extended mission starts where the current one ends at perijove 34 in June 2021 and continues through orbit 76 in September 2025. The continued northward progression of the perijove latitude, and continued lower altitude of the ascending node, is going to enable a lot of great science both at Jupiter (higher resolution views of Jupiter's poles) and of its satellites. Most excitingly for me, Juno will perform several flybys of the Galilean satellites. This includes a 1000-km encounter with Ganymede next June during PJ34, a 320-km encounter with Europa in late 2022, and TWO Io flybys in early 2024 at an altitude of 1500 km. There are also a number of "Voyager-class" encounters with Ganymede, Europa, and Io between mid-2021 and mid-2025. The PDF for Scott Bolton's presentation can be found on the page for the OPAG meeting: https://www.lpi.usra.edu/opag/meetings/opag2020fall/ -------------------- &@^^!% Jim! I'm a geologist, not a physicist!
The Gish Bar Times - A Blog all about Jupiter's Moon Io |
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Jan 9 2021, 03:21 AM
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Member Group: Members Posts: 241 Joined: 13-October 09 From: Olympus Mons Member No.: 4972 |
Large Swaths of Ganymede may be improved depending on how close it is. Though don't expect anything like Solid State Imaging.
-------------------- "Thats no moon... IT'S A TRAP!"
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Jan 9 2021, 06:01 PM
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Senior Member Group: Members Posts: 2542 Joined: 13-September 05 Member No.: 497 |
Large Swaths of Ganymede may be improved depending on how close it is. Bolton's presentation to OPAG (linked upthread) said the minimum altitude of the Ganymede flyby was 1000 km, at which Junocam would get ~670 meters/pixel resolution. It's a bit hard to say what the best resolution in the current coverage is, but it's probably better than that in most places, and the gaps are near the north and south poles, which AFAIK won't be seen in this encounter. As I said, we won't know for sure until the final flyby geometry is established. Note that this first Ganymede flyby is in mid-2021. [I guess I should mention that my perspective is obviously Junocam-centric and JIRAM will also get images, which are both higher-resolution and not subject to the limitations of darkness.] -------------------- Disclaimer: This post is based on public information only. Any opinions are my own.
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Jan 12 2021, 05:27 PM
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#4
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Senior Member Group: Members Posts: 2542 Joined: 13-September 05 Member No.: 497 |
we won't know for sure until the final flyby geometry is established. The SPK file for the current baseline (which may change) is at https://naif.jpl.nasa.gov/pub/naif/JUNO/ker...1021_210111.bsp if people want to look at it. See https://naif.jpl.nasa.gov/pub/naif/JUNO/ker..._210111.bsp.lbl for info on the flybys. CODE Satellite Flyby Events
Satellite Time Range vInf Lat W.Lon Phase Alt. km km/s deg deg deg km Ganymede 07-JUN-2021 16:56:07 UTC 3676.38 18.427 23.63 55.23 98.2 1045.2 Ganymede 20-JUL-2021 16:48:30 UTC 52631.20 17.885 -22.46 235.80 80.9 50000.0 Europa 16-OCT-2021 08:46:28 UTC 82920.00 22.502 50.00 217.54 89.8 81359.2 Europa 24-FEB-2022 18:15:38 UTC 48472.17 23.501 77.33 128.35 100.6 46911.4 Io 05-JUL-2022 04:55:50 UTC 87913.57 29.490 77.93 172.05 92.8 86092.0 Europa 29-SEP-2022 09:36:04 UTC 1916.98 23.581 -0.84 49.08 130.1 356.2 Io 14-DEC-2022 23:16:05 UTC 65547.98 30.270 75.99 112.84 100.5 63726.4 Io 01-MAR-2023 01:32:03 UTC 53390.33 29.020 55.00 208.59 71.0 51568.7 Io 16-MAY-2023 03:15:49 UTC 39219.03 29.290 54.18 206.71 67.8 37397.4 Io 31-JUL-2023 04:57:16 UTC 23988.43 29.723 65.11 188.22 77.3 22166.8 Io 15-OCT-2023 06:47:26 UTC 13448.57 29.811 65.86 182.35 77.4 11627.0 Io 30-DEC-2023 08:36:10 UTC 3316.44 30.027 63.69 94.23 108.9 1494.8 Io 03-FEB-2024 17:48:50 UTC 3245.51 30.139 -32.67 35.81 143.6 1423.9 Io 09-APR-2024 05:00:37 UTC 20373.15 29.988 -66.56 294.64 81.5 18551.6 Io 25-NOV-2024 05:33:31 UTC 85679.33 28.794 -55.42 278.23 74.5 83857.7 Io 08-MAY-2025 18:03:36 UTC 90943.96 30.643 -58.63 339.88 113.7 889122.4 -------------------- Disclaimer: This post is based on public information only. Any opinions are my own.
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Jun 9 2021, 05:46 AM
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Newbie Group: Members Posts: 17 Joined: 23-July 15 From: Austin, TX Member No.: 7615 |
(edited down to closest approaches)
CODE Satellite Flyby Events Satellite Time Range vInf Lat W.Lon Phase Alt. km km/s deg deg deg km Ganymede 07-JUN-2021 16:56:07 UTC 3676.38 18.427 23.63 55.23 98.2 1045.2 Europa 29-SEP-2022 09:36:04 UTC 1916.98 23.581 -0.84 49.08 130.1 356.2 Io 30-DEC-2023 08:36:10 UTC 3316.44 30.027 63.69 94.23 108.9 1494.8 Io 03-FEB-2024 17:48:50 UTC 3245.51 30.139 -32.67 35.81 143.6 1423.9 This is fantastic - I didn't realize we were going to get these close approaches! |
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