Juno skims the cloud tops of Jupiter

#1

Post by lelf » Sat, Jun 04, 2022, 5:15 PM UTC

Juno skims the cloud tops of Jupiter
nasa.gov

Re: Juno skims the cloud tops of Jupiter

#2

Post by WalterGR » Sat, Jun 04, 2022, 5:34 PM UTC

How much time elapses in that time-lapse?

Edit: Two hours of real-time Jupiter: https://www.youtube.com/watch?v=GPMK_6-QrIg

Re: Juno skims the cloud tops of Jupiter

#3

Post by pjscott » Sat, Jun 04, 2022, 5:39 PM UTC

In case anybody was wondering "Why is the frame rate so lousy?" the answer is that the probe only has about 325 bits per second of downlink on average.

https://en.wikipedia.org/wiki/Juno_(spacecraft)

Re: Juno skims the cloud tops of Jupiter

#4

Post by holoduke » Sat, Jun 04, 2022, 5:41 PM UTC

210,000 kilometers per hour. Almost 60km/40mi per second. Amazing speed when you think about it. Wonder if there would be any time dilation noticable if the craft ever gets captured and brought back to earth.

Re: Juno skims the cloud tops of Jupiter

#5

Post by sgt » Sat, Jun 04, 2022, 5:45 PM UTC

pjscott wrote: post #3

In case anybody was wondering "Why is the frame rate so lousy?" the answer is that the probe only has about 325 bits per second of downlink on average. https://en.wikipedia.org/wiki/Juno_(spacecraft)

Would it be possible to extrapolate frames in between to give one smooth flyover?

Re: Juno skims the cloud tops of Jupiter

#6

Post by 0daystock » Sat, Jun 04, 2022, 5:48 PM UTC

No post body was provided.

Re: Juno skims the cloud tops of Jupiter

#7

Post by ericbarrett » Sat, Jun 04, 2022, 5:49 PM UTC

holoduke wrote: post #4

210,000 kilometers per hour. Almost 60km/40mi per second. Amazing speed when you think about it. Wonder if there would be any time dilation noticable if the craft ever gets captured and brought back to earth.

Similarly I wonder if there was any detectable heating from kinetic interaction with dust and trace atmosphere. 60 km/sec is fast!

Re: Juno skims the cloud tops of Jupiter

#8

Post by xixixao » Sat, Jun 04, 2022, 5:52 PM UTC

Can someone run this through ML to create a smooth animation?

Re: Juno skims the cloud tops of Jupiter

#9

Post by pvg » Sat, Jun 04, 2022, 5:52 PM UTC

holoduke wrote: post #4

210,000 kilometers per hour. Almost 60km/40mi per second. Amazing speed when you think about it. Wonder if there would be any time dilation noticable if the craft ever gets captured and brought back to earth.

Relativistic effects are measurable with accurate enough clocks in earth satellites (or even just taking a clock to a mountain) and correction is necessary in systems with finicky time requirements like GPS.

Incidentally, the relative speed you can napkin math estimate - an object in orbit flying that close to the planet is going to have escape-velocity-ish speed. It's around 60km/sec for Jupiter.

Re: Juno skims the cloud tops of Jupiter

#10

Post by rococode » Sat, Jun 04, 2022, 5:52 PM UTC

holoduke wrote: post #4

210,000 kilometers per hour. Almost 60km/40mi per second. Amazing speed when you think about it. Wonder if there would be any time dilation noticable if the craft ever gets captured and brought back to earth.

It's about 0.01% the speed of light, which is definitely fast enough to have a measurable impact. Even ISS astronauts experience a tiny amount of time dilation (on a millisecond level) and they move at much slower speeds.