APOD: Perijove 16: Passing Jupiter (2024 Apr 21)

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APOD: Perijove 16: Passing Jupiter (2024 Apr 21)

Post by APOD Robot » Sun Apr 21, 2024 4:06 am

Image Perijove 16: Passing Jupiter

Explanation: Watch Juno zoom past Jupiter. NASA's robotic spacecraft Juno is continuing on its now month-long, highly-elongated orbits around our Solar System's largest planet. The featured video is from perijove 16, the sixteenth time that Juno passed near Jupiter since it arrived in mid-2016. Each perijove passes near a slightly different part of Jupiter's cloud tops. This color-enhanced video has been digitally composed from 21 JunoCam still images, resulting in a 125-fold time-lapse. The video begins with Jupiter rising as Juno approaches from the north. As Juno reaches its closest view -- from about 3,500 kilometers over Jupiter's cloud tops -- the spacecraft captures the great planet in tremendous detail. Juno passes light zones and dark belts of clouds that circle the planet, as well as numerous swirling circular storms, many of which are larger than hurricanes on Earth. As Juno moves away, the remarkable dolphin-shaped cloud is visible. After the perijove, Jupiter recedes into the distance, now displaying the unusual clouds that appear over Jupiter's south. To get desired science data, Juno swoops so close to Jupiter that its instruments are exposed to very high levels of radiation.

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251billyg
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Re: APOD: Perijove 16: Passing Jupiter (2024 Apr 21)

Post by 251billyg » Sun Apr 21, 2024 8:09 am

why did the swirling clouds freeze in place-was this faked? please answer

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Re: APOD: Perijove 16: Passing Jupiter (2024 Apr 21)

Post by JimB » Sun Apr 21, 2024 8:34 am

251billyg wrote: Sun Apr 21, 2024 8:09 am why did the swirling clouds freeze in place-was this faked? please answer
The clouds on Jupiter are not static. They are moving at speeds of hundreds of miles per hour. But Jupiter is so big (diameter 88,695 miles or 142,800 km) that the clouds don't appear to move significantly during this fly-by which only comes to within 3,500 km.

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Re: APOD: Perijove 16: Passing Jupiter (2024 Apr 21)

Post by Whiskybreath » Sun Apr 21, 2024 9:48 am

Fabulous. My sci-fi soul is brightened.
Or something.

Guest

Re: APOD: Perijove 16: Passing Jupiter (2024 Apr 21)

Post by Guest » Sun Apr 21, 2024 10:03 am

1) it would have been nice to state the date rather than say it was the 16th pass…like that tells us anything.
2) on a personal note, I hate when people add music to space videos.

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Re: APOD: Perijove 16: Passing Jupiter (2024 Apr 21)

Post by Christian G. » Sun Apr 21, 2024 11:29 am

Mighty Jupiter… Twice as massive as all other planets of the solar system combined. But 80 times less massive than the smallest stars!

Roy

Re: APOD: Perijove 16: Passing Jupiter (2024 Apr 21)

Post by Roy » Sun Apr 21, 2024 12:55 pm

Guest wrote: Sun Apr 21, 2024 10:03 am 1) it would have been nice to state the date rather than say it was the 16th pass…like that tells us anything.
2) on a personal note, I hate when people add music to space videos.
Could really do better with the William Tell Overture instead of that squirrel music.
The APODs focus on the “ oh, Wow!” Factor rather than giving information. “Look, a brown cloud shaped like a dolphin!” - instead of what the brown clouds are composed of, vs. white clouds, what causes the clouds to separate in large bands. Radiation is mentioned, danger to instruments, but what kind and how much?

If the answer to something is IDK, THAT is never admitted.

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Re: APOD: Perijove 16: Passing Jupiter (2024 Apr 21)

Post by Chris Peterson » Sun Apr 21, 2024 1:08 pm

Roy wrote: Sun Apr 21, 2024 12:55 pm
Guest wrote: Sun Apr 21, 2024 10:03 am 1) it would have been nice to state the date rather than say it was the 16th pass…like that tells us anything.
2) on a personal note, I hate when people add music to space videos.
Could really do better with the William Tell Overture instead of that squirrel music.
The APODs focus on the “ oh, Wow!” Factor rather than giving information. “Look, a brown cloud shaped like a dolphin!” - instead of what the brown clouds are composed of, vs. white clouds, what causes the clouds to separate in large bands. Radiation is mentioned, danger to instruments, but what kind and how much?

If the answer to something is IDK, THAT is never admitted.
APOD captions regularly point out features that can't be explained yet.

Although knowing the date isn't all that useful here, the simplest Google search provides the information: https://www.missionjuno.swri.edu/mission-perijoves
Chris

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Re: APOD: Perijove 16: Passing Jupiter (2024 Apr 21)

Post by saturnine » Sun Apr 21, 2024 1:14 pm

Roy wrote: Sun Apr 21, 2024 12:55 pm Could really do better with the William Tell Overture instead of that squirrel music.
I think “Jupiter, the Bringer of Jollity” by Holst is quite appropriate.

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Re: APOD: Perijove 16: Passing Jupiter (2024 Apr 21)

Post by Chris Peterson » Sun Apr 21, 2024 1:26 pm

saturnine wrote: Sun Apr 21, 2024 1:14 pm
Roy wrote: Sun Apr 21, 2024 12:55 pm Could really do better with the William Tell Overture instead of that squirrel music.
I think “Jupiter, the Bringer of Jollity” by Holst is quite appropriate.
Until you recognize that Holst was addressing astrology, not astronomy!
Chris

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Re: APOD: Perijove 16: Passing Jupiter (2024 Apr 21)

Post by nucmedtech » Sun Apr 21, 2024 4:19 pm

Holst was addressing astrology, but incidentally touched on Roman/Greek mythology, as does most Western astrology. Each movement is based on the supposed characteristics of the Roman/Greek deity after which the planet is named. Mercury, the Messenger of the gods. Venus, the goddess of Love. Mars, the god of War. Jupiter, the god of Luck and Celebration. Saturn, the god of Time and Renewal. Uranus (a Greek deity), god of the Heavens, the husband of Gaea (Earth), father of Titans, a mysterious figure without apparent temples or worshippers. Neptune, god of the sea and depths unknown.

I was pleasantly surprised to hear "Jupiter, Bringer of Jollity" as the soundtrack to this flyby. I adore the Planets Suite and find that many people have never heard it or even heard OF it.

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Re: APOD: Perijove 16: Passing Jupiter (2024 Apr 21)

Post by johnnydeep » Sun Apr 21, 2024 4:25 pm

Two questions about some info from the links:

1. Why does the Jove probe spin - stability I guess? But doesn't that negatively impact the ability to take pictures? And how fast is it spinning? [ EDIT: only 1.4 rpm, from the Wikipedia link, which is pretty slow! ]
2. What does this mean:
The movie is a reconstruction of the 114 minutes between 2018-10-29T20:35:00.000 and 2018-10-29T22:29:00.000 in 125-fold time-lapse.
It is based on 21 of the JunoCam images taken, and on spacecraft trajectory data provided via SPICE kernel files.

In steps of five real-time seconds, one still images of the movie has been rendered from at least one suitable raw image. This resulted in short scenes, usually of a few seconds. Playing with 25 images per second results in 125-fold time-lapse.
I can see that 21 * 5 = 125, but how does 25 images per second come into play? That would seem to result in a mere 5 second video!
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Re: APOD: Perijove 16: Passing Jupiter (2024 Apr 21)

Post by Chris Peterson » Sun Apr 21, 2024 4:31 pm

johnnydeep wrote: Sun Apr 21, 2024 4:25 pm Two questions about some info from the links:

1. Why does the Jove probe spin - stability I guess? But doesn't that negatively impact the ability to take pictures? And how fast is it spinning?
https://www.jpl.nasa.gov/news/press_kit ... pacecraft/
Chris

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Re: APOD: Perijove 16: Passing Jupiter (2024 Apr 21)

Post by johnnydeep » Sun Apr 21, 2024 4:44 pm

Chris Peterson wrote: Sun Apr 21, 2024 4:31 pm
johnnydeep wrote: Sun Apr 21, 2024 4:25 pm Two questions about some info from the links:

1. Why does the Jove probe spin - stability I guess? But doesn't that negatively impact the ability to take pictures? And how fast is it spinning?
https://www.jpl.nasa.gov/news/press_kit ... pacecraft/
Thanks. Yeah, I found the 1.4 rpm figure in Wikipedia shortly after I posted. I edited my post. See also my other question about how the movie was composed.
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Re: APOD: Perijove 16: Passing Jupiter (2024 Apr 21)

Post by bls0326 » Sun Apr 21, 2024 11:07 pm

johnnydeep wrote: Sun Apr 21, 2024 4:25 pm .
.
2. What does this mean:
The movie is a reconstruction of the 114 minutes between 2018-10-29T20:35:00.000 and 2018-10-29T22:29:00.000 in 125-fold time-lapse.
It is based on 21 of the JunoCam images taken, and on spacecraft trajectory data provided via SPICE kernel files.

In steps of five real-time seconds, one still images of the movie has been rendered from at least one suitable raw image. This resulted in short scenes, usually of a few seconds. Playing with 25 images per second results in 125-fold time-lapse.
I can see that 21 * 5 = 125, but how does 25 images per second come into play? That would seem to result in a mere 5 second video!
The "color-enhanced" link has a writeup about the images/video. here is the link https://www.youtube.com/watch?v=vsGW2JZrMnY

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Re: APOD: Perijove 16: Passing Jupiter (2024 Apr 21)

Post by johnnydeep » Mon Apr 22, 2024 1:01 pm

bls0326 wrote: Sun Apr 21, 2024 11:07 pm
johnnydeep wrote: Sun Apr 21, 2024 4:25 pm .
.
2. What does this mean:
The movie is a reconstruction of the 114 minutes between 2018-10-29T20:35:00.000 and 2018-10-29T22:29:00.000 in 125-fold time-lapse.
It is based on 21 of the JunoCam images taken, and on spacecraft trajectory data provided via SPICE kernel files.

In steps of five real-time seconds, one still images of the movie has been rendered from at least one suitable raw image. This resulted in short scenes, usually of a few seconds. Playing with 25 images per second results in 125-fold time-lapse.
I can see that 21 * 5 = 125, but how does 25 images per second come into play? That would seem to result in a mere 5 second video!
The "color-enhanced" link has a writeup about the images/video. here is the link https://www.youtube.com/watch?v=vsGW2JZrMnY
That's where I got the text in my post from! But it doesn't explain it fully for me. (I can be dense sometimes...)
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