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Due to concerns about engine, Juno to remain in elongated Jupiter orbit

Flyaway

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The Leros engine has commonalities with other engines that have called issues including MUOS 5 I believe.

“During a thorough review, we looked at multiple scenarios that would place Juno in a shorter-period orbit, but there was concern that another main engine burn could result in a less-than-desirable orbit,” said Rick Nybakken, Juno project manager at NASA’s Jet Propulsion Laboratory in Pasadena, California. “The bottom line is a burn represented a risk to completion of Juno’s science objectives.”

Operating Juno beyond its designed lifetime comes with a price tag, too. The requested budget for Juno operations in fiscal year 2017 was $39.1 million, which was projected to fall to $14.5 million in 2018 as the mission came to a close. Now, if NASA must come up with an additional $100 to $150 million for an extended mission, those costs will almost certainly harm other missions in the agency’s science directorate.

https://arstechnica.com/science/2017/02/due-to-concerns-about-engine-juno-to-remain-in-elongated-jupiter-orbit/
 

Archibald

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How ironic ! Juno (notably its solar panels) was to be fried by Jupiter radiation belts, hence a short lived mission... fate has decided otherwise.
 

blackstar

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Archibald said:
How ironic ! Juno (notably its solar panels) was to be fried by Jupiter radiation belts, hence a short lived mission... fate has decided otherwise.

As I understand it, the maximum dose is encountered at closest approach. It will still have the same number of close approaches, but they will happen further apart because of the bigger orbit. Of course, a longer mission will cost more money.
 

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Juno in good health; decision point nears on mission's end or extension

https://www.nasaspaceflight.com/2018/02/juno-good-health-decision-point-missions-end-extension/
 

Flyaway

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Jupiter Abyss
NASA’s Juno spacecraft captured this view of an area within a Jovian jet stream showing a vortex that has an intensely dark center. Nearby, other features display bright, high altitude clouds that have puffed up into the sunlight.

The color-enhanced image was taken at 12:55 a.m. PDT (3:55 a.m. EDT) on May 29, 2019, as the spacecraft performed its 20th science flyby of Jupiter. At the time, Juno was about 9,200 miles (14,800 kilometers) from the planet's cloud tops, above approximately 52 degrees north latitude.
Citizen scientists Gerald Eichstädt and Seán Doran created and named this image using data from the spacecraft's JunoCam imager.

JunoCam's raw images are available for the public to peruse and process into image products at https://missionjuno.swri.edu/junocam/processing.

 

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'Shallow Lightning' and 'Mushballs' Reveal Ammonia to NASA's Juno Scientists

The spacecraft may have found where the colorless gas has been hiding on the solar system's biggest planetary inhabitant.

New results from NASA's Juno mission at Jupiter suggest our solar system's largest planet is home to what's called "shallow lightning." An unexpected form of electrical discharge, shallow lightning originates from clouds containing an ammonia-water solution, whereas lightning on Earth originates from water clouds.

Other new findings suggest the violent thunderstorms for which the gas giant is known may form slushy ammonia-rich hailstones Juno's science team calls "mushballs"; they theorize that mushballs essentially kidnap ammonia and water in the upper atmosphere and carry them into the depths of Jupiter's atmosphere.
 

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