Juno Extended Mission, Perijove 34-76 |
Juno Extended Mission, Perijove 34-76 |
Jun 9 2021, 11:14 PM
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#76
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Member Group: Members Posts: 154 Joined: 8-June 04 Member No.: 80 |
Cassini got many targets of opportunity because it stayed in the plane shared by the satellites, for many years, as well as the (generally) shorter orbits and much larger resolution on the camera, so the spacecraft didn't need to get particularly close. There were also many more small targets to choose from, of course. I think you meant Galileo. Cassini flew by Jupiter briefly in 2000. |
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Jun 9 2021, 11:21 PM
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#77
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Senior Member Group: Members Posts: 2542 Joined: 13-September 05 Member No.: 497 |
Not that much of a chance. A 53 day orbit means a little less than 7 perijoves per year. Agreed, although the orbit period has now been reduced to 43 days. I ran a search with the reference trajectory a while back, and the best one I found then was an 8-pixel view of Amalthea in July 2025 which may or may not be usable within other constraints. -------------------- Disclaimer: This post is based on public information only. Any opinions are my own.
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Jun 9 2021, 11:36 PM
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#78
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Senior Member Group: Members Posts: 2106 Joined: 13-February 10 From: Ontario Member No.: 5221 |
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Jun 10 2021, 10:09 PM
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#79
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Senior Member Group: Members Posts: 1276 Joined: 25-November 04 Member No.: 114 |
There are still distant observations I believe are planned. There are shown here. https://www.youtube.com/watch?v=hAgLl354PbE...i5&index=15
Ganymede Mid 2021 50,000KM Europa Mid 2021 88,000KM Europa Early 2022 47,000KM Io Mid 2022 85,000KM Plus more. |
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Aug 1 2021, 10:30 PM
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#80
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Member Group: Members Posts: 447 Joined: 1-July 05 From: New York City Member No.: 424 |
Does anyone recognize who processed this image? Was it one of our resident wizards?
https://twitter.com/konstructivizm/status/1...794085103230980 It was posted in another forum, and I'd like to add an appropriate credit. |
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Aug 3 2021, 06:50 AM
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#81
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Member Group: Members Posts: 427 Joined: 18-September 17 Member No.: 8250 |
Does anyone recognize who processed this image? Was it one of our resident wizards? https://twitter.com/konstructivizm/status/1...794085103230980 It was posted in another forum, and I'd like to add an appropriate credit. Looks like a derivative of this PJ06_123 image https://www.missionjuno.swri.edu/junocam/processing?id=1330 which is the work of Gerald Eichstädt and Justin Cowart. |
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Aug 4 2021, 02:25 AM
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#82
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Member Group: Members Posts: 447 Joined: 1-July 05 From: New York City Member No.: 424 |
Thanks very much.
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Apr 23 2024, 11:57 PM
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#83
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Member Group: Members Posts: 241 Joined: 13-October 09 From: Olympus Mons Member No.: 4972 |
With the Galilean flyby's accomplished, eyes will start turning towards whether Juno will get another mission extension next year. Any possible clues on what will happen?
-------------------- "Thats no moon... IT'S A TRAP!"
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May 16 2024, 11:29 PM
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#84
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Merciless Robot Group: Admin Posts: 8785 Joined: 8-December 05 From: Los Angeles Member No.: 602 |
Nice JPL article about recent Europa observations from JunoCam.
-------------------- A few will take this knowledge and use this power of a dream realized as a force for change, an impetus for further discovery to make less ancient dreams real.
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May 17 2024, 01:40 AM
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#85
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Senior Member Group: Members Posts: 2106 Joined: 13-February 10 From: Ontario Member No.: 5221 |
With the Galilean flyby's accomplished, eyes will start turning towards whether Juno will get another mission extension next year. Any possible clues on what will happen? What is the limiting factor on operations continuing? It's not radiation damage (which has been much more benign than expected), so it is fuel, or some other system that is reaching the end of life? |
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Jul 8 2024, 03:16 AM
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#86
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Member Group: Members Posts: 427 Joined: 18-September 17 Member No.: 8250 |
What is the limiting factor on operations continuing? It's not radiation damage (which has been much more benign than expected), so it is fuel, or some other system that is reaching the end of life? I've also wondered if the fuel not used for the post JOI burn to change orbit to 14-day period is available to small thrusters, or if they are separate systems. |
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Jul 8 2024, 04:44 AM
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#87
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Senior Member Group: Members Posts: 2542 Joined: 13-September 05 Member No.: 497 |
I've also wondered if the fuel not used for the post JOI burn to change orbit to 14-day period is available to small thrusters, or if they are separate systems. If you believe the simplified diagram in https://llis.nasa.gov/lesson/28105 then all the hydrazine fuel is available to the monoprop thrusters. -------------------- Disclaimer: This post is based on public information only. Any opinions are my own.
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Jul 8 2024, 06:11 AM
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#88
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Member Group: Members Posts: 427 Joined: 18-September 17 Member No.: 8250 |
If you believe the simplified diagram in https://llis.nasa.gov/lesson/28105 then all the hydrazine fuel is available to the monoprop thrusters. Thanks. Cool read. Hopefully all the instruments last as long as all that fuel. |
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Jul 8 2024, 02:58 PM
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#89
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Senior Member Group: Members Posts: 2542 Joined: 13-September 05 Member No.: 497 |
Hopefully all the instruments last as long as all that fuel. Not clear how much that is, though, since the mission has lasted far longer and done more monoprop maneuvers than ever intended. The status update at the last OPAG said "end of mission likely defined by propellant or radiation" and indicated that the project was considering an additional 11 orbits, out to PJ87. -------------------- Disclaimer: This post is based on public information only. Any opinions are my own.
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