Juno Extended Mission, Perijove 34-76 Options

[pioneer]

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.

[mcaplinger]

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.

[Explorer1]

I think you meant Galileo. Cassini flew by Jupiter briefly in 2000.

No, I meant Cassini (referring to flybys of very small irregular satellites). Saturn just has so many more to choose from.

[Decepticon]

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.

Attached thumbnail(s)

 

[Tom Tamlyn]

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.

[Brian Swift]

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.

[Tom Tamlyn]

Thanks very much.

[Antdoghalo]

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?

[nprev]

Nice JPL article about recent Europa observations from JunoCam.

[Explorer1]

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?

[Brian Swift]

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.

[mcaplinger]

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.

[Brian Swift]

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.

[mcaplinger]

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.