Missie Juno: een ontdekkingsreis naar Jupiter

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Op zaterdag 27 augustus 2016 23:46 schreef rubbereend het volgende:
de dichtste scheervlucht is inmiddels gepasseerd vandaag, de eerste foto van 437,000 miles afstand, hij scheerde uiteindelijk voorbij op 2,600 miles. De eerste foto:

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Op zondag 28 augustus 2016 00:06 schreef LXIV het volgende:

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Dit is niks bijzonders. Hopelijk komen er nog echte scherpe foto's. Zit er al lang op te wachten!

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Op dinsdag 30 augustus 2016 21:45 schreef LXIV het volgende:
Is er al iets ontvangen?

twitter:

NASAJuno twitterde op zondag 28-08-2016 om 00:03:51 @barezb JunoCam images are expected to be released the next couple of weeks, including the highest-resolution views of the Jovian atmosphere reageer retweet

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Op woensdag 31 augustus 2016 14:47 schreef Bosbeetle het volgende:
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Jupiter’s North Pole Unlike Anything Encountered in Solar System

NASA’s Juno spacecraft has sent back the first-ever images of Jupiter’s north pole, taken during the spacecraft’s first flyby of the planet with its instruments switched on. The images show storm systems and weather activity unlike anything previously seen on any of our solar system’s gas-giant planets.

Juno successfully executed the first of 36 orbital flybys on Aug. 27 when the spacecraft came about 2,500 miles (4,200 kilometers) above Jupiter’s swirling clouds. The download of six megabytes of data collected during the six-hour transit, from above Jupiter’s north pole to below its south pole, took one-and-a-half days. While analysis of this first data collection is ongoing, some unique discoveries have already made themselves visible.

“First glimpse of Jupiter’s north pole, and it looks like nothing we have seen or imagined before,” said Scott Bolton, principal investigator of Juno from the Southwest Research Institute in San Antonio. “It’s bluer in color up there than other parts of the planet, and there are a lot of storms. There is no sign of the latitudinal bands or zone and belts that we are used to -- this image is hardly recognizable as Jupiter. We’re seeing signs that the clouds have shadows, possibly indicating that the clouds are at a higher altitude than other features.”

One of the most notable findings of these first-ever pictures of Jupiter’s north and south poles is something that the JunoCam imager did not see.

“Saturn has a hexagon at the north pole,” said Bolton. “There is nothing on Jupiter that anywhere near resembles that. The largest planet in our solar system is truly unique. We have 36 more flybys to study just how unique it really is.”

Along with JunoCam snapping pictures during the flyby, all eight of Juno’s science instruments were energized and collecting data. The Jovian Infrared Auroral Mapper (JIRAM), supplied by the Italian Space Agency, acquired some remarkable images of Jupiter at its north and south polar regions in infrared wavelengths.

“JIRAM is getting under Jupiter’s skin, giving us our first infrared close-ups of the planet,” said Alberto Adriani, JIRAM co-investigator from Istituto di Astrofisica e Planetologia Spaziali, Rome. “These first infrared views of Jupiter’s north and south poles are revealing warm and hot spots that have never been seen before. And while we knew that the first-ever infrared views of Jupiter's south pole could reveal the planet's southern aurora, we were amazed to see it for the first time. No other instruments, both from Earth or space, have been able to see the southern aurora. Now, with JIRAM, we see that it appears to be very bright and well-structured. The high level of detail in the images will tell us more about the aurora’s morphology and dynamics.”

Among the more unique data sets collected by Juno during its first scientific sweep by Jupiter was that acquired by the mission’s Radio/Plasma Wave Experiment (Waves), which recorded ghostly-sounding transmissions emanating from above the planet. These radio emissions from Jupiter have been known about since the 1950s but had never been analyzed from such a close vantage point.

“Jupiter is talking to us in a way only gas-giant worlds can,” said Bill Kurth, co-investigator for the Waves instrument from the University of Iowa, Iowa City. “Waves detected the signature emissions of the energetic particles that generate the massive auroras which encircle Jupiter’s north pole. These emissions are the strongest in the solar system. Now we are going to try to figure out where the electrons come from that are generating them.”

twitter:

NASAJuno twitterde op vrijdag 02-09-2016 om 19:32:29 Hot stuff. During #Jupiter approach, I captured the planet’s glow in infrared light https://t.co/mVWrzSlV9o https://t.co/9kaRIl2k9n reageer retweet

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Op vrijdag 2 september 2016 20:36 schreef Perrin het volgende:
De heldere plekken op de IR-opnames zijn dan denk ik gebieden waar warm gas uit het binnenste naar hogere lagen beweegt?

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Op vrijdag 2 september 2016 22:49 schreef Tchock het volgende:

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Ik weet niet wat die video is, maar blijkens het bijschrift is dit een aurora (geladen deeltjes van zonnewind die reageren met Jupiters' magnetische veld en de atmosfeer), dus niet direct gerelateerd aan temperatuur.

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Hier meer info over die foto.

http://www.jpl.nasa.gov/spaceimages/details.php?id=PIA21033

Jupiter's Glow in Infrared Light

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Op woensdag 18 januari 2017 08:59 schreef ExperimentalFrentalMental het volgende:

Juno cirkelt momenteel in een ovaalvormige baan rond Jupiter heen. Deze baan brengt de sonde één keer in de 53 dagen dicht bij Jupiter in de buurt. Het is het ultieme moment voor het maken van foto’s en bestuderen van de gasreus. De eerstvolgende keer dat de sonde weer zo dicht bij Jupiter in de buurt komt, is op 2 februari.

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Op woensdag 18 januari 2017 09:41 schreef nanuk het volgende:

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Heeft het een speciale reden dat die baan zo sterk ovaal is? Met een permanent lagere baan kan je veel meer lijkt mij toch? Of kost het gewoon (te) veel energie om die baan te bereiken.

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The Jupiter Orbit Insertion Burn places Juno in a highly elliptical orbit around Jupiter with an inclination of 90 degrees (+/-10 degrees) and a period of 53.5 days. This mission design feature benefits the mission’s total dV that decreases in the scenario of a pair of Capture Orbits being implemented into the mission. This also eliminates the concern of making burns in excess of 60 minutes with the Leros main engine.