Questions tagged [juno]
Questions regarding the JUNO spacecraft, a NASA mission to Jupiter.
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Does Juno have enough fuel to push itself into a more elliptical orbit reaching out to Himalia? [duplicate]
Does the Juno probe have enough fuel to push itself into a highly elliptical orbit around Jupiter so that its apojove would be at Himalia's orbital distance to study Himalia better? Would a gravity ...
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Can Juno use Jupiter's gravity to alter its orbit so that it goes close to Himalia?
Himalia is the most massive and second largest non-Galilean moon of Jupiter. Yet, due to its distant orbit, we still don't have sharp images of it. Does Juno have enough fuel to alter its orbit with ...
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Extended mission options for Juno?
Juno has been given several mission extensions, the last (and most exciting) of which involves close passes to three of the Galilean satellites, also allowing them to trim its orbit every time, and ...
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Did JUNO adjust it's orbit in order to fly over Clyde's spot again?
Phys.org's Juno returns to 'Clyde's Spot' on Jupiter says:
The feature is informally named for amateur astronomer Clyde Foster of Centurion, South Africa, who discovered it in 2020 using his own 14-...
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Does the Juno spacecraft have an "open signal, by design"?
The click-bate title'd Space News article China quietly used NASA’s Jupiter probe to test its deep space network contains the quoted material below.
Everybody listens to everybody else's spacecraft's ...
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Is Jupiter bright enough to be seen in color by the naked eye from Jupiter orbit?
After seeing spectacular photographs of Jupiter, especially this one:
I wondered if this would be visible with the naked eye from Jupiter orbit? Is the sunlight at Jupiter bright enough to see this ...
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Did Juno do a plane change circa October 2019? If so, by how much?
There are several reports in the news that the Juno spacecraft executed a very long propulsive maneuver so that it wouldn't pass through Jupiter's shadow. Apparently it would be in dark so long that ...
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Why does this image of Jupiter look so strange?
The Universe Today's Yes, This is Actually the Shadow of Io Passing Across the Surface of Jupiter shows several images of Jupiter taken by JunoCam.
Why does this image look so strange? Instead of an ...
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Why did Cassini have reaction wheels but Galileo, Juno and New Horizons don't?
Three gas giant planet orbiters are mentioned in this answer:
Cassini - Uses Reaction Wheels and thrusters
Galileo - Primarily managed via spinning the spacecraft and thrusters.
Juno - Just ...
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Given that JunoCam is mainly for outreach, how bad is it as a scientific instrument?
According to Wikipedia's article on JunoCam (and I have seen other corroborating sources):
JunoCam is not one of the probe's core scientific instruments; it was put on board primarily for public ...
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When did deep-space probes start getting wrapped in germanium-coated film?
The NASA video Juno Engineering: Precision Matters shows the Juno spacecraft on what look like it might be a spin balance table after about 02:50 and there one can ...
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Why was the image sensor design for Juno so... odd? [duplicate]
I attended the North Eastern Astronomy Forum this year and one of the speakers was mentioning that JunoCam will not be working because of the angle of the spacecraft. He was giving a lecture on what ...
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Discrepancy between Launch Vehicle Performance website on Atlas V 551 with Juno
I was looking at the Juno space probe which was launched in August 2011 onboard an Atlas V 551. In particular I was looking at https://elvperf.ksc.nasa.gov/Pages/News.aspx and using the performance ...
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How, and How Well will Juno measure the effects of frame dragging? (GR effect due to Jupiter's mass & rotation)
This answer links to Spaceflight 101's One Week to Jupiter – NASA’s Juno Spacecraft en-route to Gas Giant after five-year Journey which says
Also, Juno will put Einstein’s General Theory of ...
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Does Juno's UVS have any chance to spot Europa plumes?
JIRAM has recently been proven to be useful to monitor the volcanic activity on Io, from a considerable distance.
Europa Clipper will have an ultraviolet spectrograph which be pretty much a copy of ...
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Has budgetary support for Juno been extended, or is it running out?
The Yahoo news article NASA’s Juno snapped another photo of Jupiter that looks like a watercolor painting is a reminder that Juno is generating plenty of data and beautiful images.
The Juno ...
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Juno RF power output
What is the RF Power Output from Juno into its Parabolic dish, and the RF radiated out from the dish and the eventual power received say at the dish in Canberra which obviously then would need to be ...
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What is the difference in resolution between the cameras in Voyager and Juno?
Both Voyager I and the Juno spacecraft photographed Jupiter (among other things). What is the difference in camera resolution between the two spacecraft? Did we receive larger photos from Juno?
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How did the upper stage of the Juno 1 rocket change its orientation while it was spinning?
The upper stage of the Juno 1 rocket was spun up to a high speed prior to launch so it would be spin stabilized and not require a guidance system. After the upper stage separated from the 1st stage it ...
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What exactly is the interaction that blocked Juno's data downlink near solar conjunction?
According to Space.com's article Juno Phones Home: Jupiter Probe Reconnects with Earth After 8th Flyby, Juno's recent close flyby of Jupiter and data collection happened while Jupiter was too close to ...
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Why does a spacecraft's attitude become stable when it rotates?
What is the logic behind spacecraft spinning to increase stability? How does angular momentum play a role in this?
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If Juno's long orbit means a lower rate of radiation damage, why the planned short orbit?
The Juno Spacecraft (also Wikipedia, launch 05-Aug-2011, Jupiter orbit insertion 05-Jul-2016) was scheduled for a burn to reduce it's period from about 54 days to 14 days, while maintaining a ...
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Juno's original orbit around Jupiter - is this apsidal precession? If so, need expression
Below is a plot of Juno's originally planned orbit around Jupiter, extracted from JPL Horizons. It's shown in J2000 ecliptic coordinates, centered on the Jupiter barycenter. It turns out the orbit is ...
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JPL Horizons original reference orbit data for Juno - how to retrieve now that it's been updated?
Because of the slow helium valve responses, Juno was not instructed to execute the large delta-v maneuver to drop from the ~53 day orbit to the ~14 day orbit originally scheduled for 2016-Oct-19.
I'd ...
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Juno possible retirement adjustment
Notice: I deeply apologize if I'm missing a Logical Issue to this Plan.
Instead of ending Juno's mission in 2018 by deorbiting it into Jupiter why not follow these steps.
Allow the amount of time ...
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Juno launch to aphelion
I would like to calculate the length of the semi-major axis of Juno's initial heliocentric ellipse from launch to aphelion based on the time from launch to aphelion. Do I use the full 394 days from ...
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If Juno will experience lower levels of radiation than Galileo did why it will fail so much faster?
In the section about Orbit and Environment the Wikipedia article about the Juno spacecraft says:
In comparison, Juno will receive much lower levels of radiation than the Galileo orbiter at its ...
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Why does Juno use "mixed oxides of nitrogen" oxidizer for propulsion? Which ones?
In the recent Spaceflight 101 article Rocket Burn postponed for NASA’s Juno, to remain in elongated Jupiter Orbit until December it says:
Juno uses a bi-propellant main propulsion system with ...
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Why would Juno's originally planned orbit lowering partially mitigate radiation damage?
I'm trying to understand where Juno will pick up most of the slow, cumulative radiation damage within it's orbit.
Currently it is in the higher, 53 day orbit. The original plan was that tomorrow (2016-...
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Why are photos from Juno such low resolution?
NASA recently published this photo taken by Juno, at a distance of about 700,000kms from Jupiter:
The overall quality (very grainy around the darker regions, a bit washed-out in the brighter areas, ...
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How to know when JPL Horizons is updated with new Juno spacecraft trajectory?
I "watched" Juno's flyby of Jupiter using the simulation in the NASA's Eyes app on my laptop, and later saw the good news in this tweet. Now I want to do a "flyby in Python".
Using the setup (shown ...
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Why are these multi-junction solar cells 40% efficient on earth but 30% in space?
This video about Spectrolab's spacecraft power systems mentions Juno several times and it looks like the Juno panels are shown at several points in the video. Multi-junction cells are discussed, they ...
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How slingshot is used to increase the speed of Juno [duplicate]
I have gone through the slingshot for the Juno with the earth.
I have also seen the train and ball example as given by NASA. [http://solarsystem.nasa.gov/basics/grav/primer.php]
But, I am still ...
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What are the implications if Juno finds that Jupiter has a solid core?
Juno has arrived at Jupiter, and will begin taking measurements to determine if the gas giant has a solid core. But what I cannot seem to find is the implications such a discovery would have. This ...
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Does NASA use Newtonian model of gravity for plotting the course of Juno or general relativity?
With the huge mass of Jupiter and its fast, approximately 10 hours daily rotation, there may be substantial twisting of space-time around it.
A distortion of such magnitude that may call for ...
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How is JunoCam different from a normal CCD camera?
JunoCam has tweeted us! More background from the BBC.
It is supposed to have several features that help allow it to work in the high radiation and magnetic fields it will experience during each ...
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Jupiter's impact on Juno's solar panels
Juno has large solar panels on it. I was curious about their effectiveness when Juno is closest to Jupiter.
Does Jupiter have a significant impact on the solar panels? Can the solar panels ...
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When will Juno send us some pictures from it's tight orbit?
Juno probe has sent few pictures as it approached Jupiter from afar, but Jupiter looks as large as Moon on our sky on those photos. After that it went into (intentional) silence while it was trying to ...
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Why do Juno's solar panels narrow toward the core?
I'm no engineer, but if I was making a vessel with extending sails, solar panels, mast, antennae, etc. I would make them widest close to the core. But Juno's solar panels narrow toward the core as ...
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Who built Juno's chipsets?
Lockheed Martin was responsible for the construction of Juno. But I was wondering who built the chips Juno uses for its onboard computers, and whether or not they are radiation hardened. I would ...
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The plane of the orbit of Juno around Jupiter is not the ecliptic plane. How did it get into this plane?
Did Juno start off its course on the ecliptic plane from the earth orbit and then left it at insertion to Jupiter's orbit over its north pole or it was always in that plane?
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How to understand this NASA animation of Juno's passes near Jupiter?
I don't understand! Rotating frame? I see Orion pass by around 00:30 to 00:36, that's a clue.
Why the first two passes are on the same side (in this view) but the rest alternate? edit: This is ...
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Why wasn't an RTG used on the Juno spacecraft?
When I first heard about the Juno spacecraft, I was surprised that it would be using solar panels to generate power throughout the mission. Why wasn't a radioisotope thermoelectric generator (RTG) ...
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Is there any publicly available logging, or "Wayback Machine" for DSN Now activity?
This question and especially this comment address activity associated with the Juno mission, both circa arrival, and the relatively quiet transit period to Jupiter. The idea is that there may have ...
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When can we (public) expect to see the first optical images of Jupiter from the Juno spacecraft?
As many of us know, Juno spacecraft achieved orbit of Jupiter yesterday (July 4, 2016). Does anyone have an educated guess on approximately when we might see the first optical images from Juno in ...
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When Juno finally de-orbits into Jupiter, will metal sink to the core, or remain in the atmosphere?
The answer would have to be best scientific guess or theory, rather than fact, but has any thought been given to what actually happens to the metallic elements of a spacecraft de-orbited into Jupiter? ...
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Juno to Jupiter Budget
Would the Juno program be more cost effective if the spacecraft took a direct flight to Jupiter rather than using gravitational pull from planets, which took nearly 5 years instead of say, 2 years? ...
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How does a spacecraft know that it is in orbit?
After a 5 year long journey in space, Juno finally reached and started orbiting Jupiter. How does the probe actually know that it is in orbit, so that it can send confirmation message like 'Welcome to ...
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How long does it take for a signal to travel between Earth, and Juno at Jupiter?
How long would it take for Juno's communication to reach the Earth? In other words: what is the time delay between perception by Juno and perception by NASA researchers?
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Why destroy Juno at the end of the mission?
As follows from the mission timeline:
Launch - August 5, 2011
Deep Space Maneuvers - August/September 2012
Earth flyby gravity assist - October 2013
Jupiter arrival - July 2016
Spacecraft will orbit ...
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