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Low Earth Orbit Visualization

platform.leolabs.space

61–70 of 195 posts

Re: Low Earth Orbit Visualization

#61

These kinds of visualizations give you the impression that LEO is much more crowded than it actually is.

I feel like the "objects" aren't anywhere near being to scale. Pretty sure they should be MUCH MUCH smaller relative to the earth to be realistic.

There's another comment saying that the ISS to scale at the default zoom would be roughly 1/150th of a pixel. It stands to reason that every satellite here is much, much smaller than that.

Re: Low Earth Orbit Visualization

#62
post #5

Neat. I wonder if this is solely generated from their array of distrbuted sensors, or if this is just another visualization tool using space-track.org's data.

Im on my phone but you could probably look in the network requests panel of your browsers developer tools to see if any request is sent to space-track.org. Side note: does anyone know of a good tool / app for looking at things like that on iOS ?

space-track has pretty aggressive rate limiting, so they'd probably download the catalog to their servers once a day or so and work off of that.

Re: Low Earth Orbit Visualization

#64
post #63

How do you launch a satellite without risking running into one of these things on the way up? Do you have to calculate the trajectories of all of them individually?

Yes they do know the trajectories so you put yours in a one where it should not hit anything. Most modern satellites also have engines so they can move on their orbit to dodge stuff if needed. Also remember that space is 3 dimensional so you can be at the same exact "spot" on this map but still be few kilometers apart.

Also this visualization is kind of misleading as it makes the satellites look way too big. In reality you could not even see them from even from the closest zoom available.

Re: Low Earth Orbit Visualization

#65
post #28

Those long, straight-line convoys of Starlink satellites are fascinating. There's a few of them I could see scattered around the Earth. At what point do they start breaking up into unrelated orbits? Looking forward to using this website to try spotting satellites at night. There's something strangely thrilling about seeing objects in the night sky that were placed there by people.

For spotting satellites at night, try my site: https://james.darpinian.com/satellites/ Most of the satellites shown on the Leolabs site are too dim to see without a telescope because they don't reflect enough light. My site calculates brightness and filters down to the ones that you can see with the unaided eye. There are still quite a few! ISS in particular is very bright and can even be seen before sunset. The new…

Very nice! Thanks for sharing this--looking forward to using your website!

Re: Low Earth Orbit Visualization

#66
post #63

How do you launch a satellite without risking running into one of these things on the way up? Do you have to calculate the trajectories of all of them individually?

Yes. But luckily computers are fast and the spaces between each of those dots is (usually) pretty big.

Re: Low Earth Orbit Visualization

#68
post #59
post #22

If the earth is 750 pixels wide in the default zoom, each pixel is 10mi/16km. Scale image of the ISS would be roughly 1/150th of a pixel.

Thank you for this. While the visualization is useful/interesting, it frustrates me how often similar visuals are used in news stories about space junk. Yes, it's a problem, but using visuals like this without proper explanation misrepresents it terribly.

Yes, and they don't add footnotes. From visualization it looks like crash is inevitable. But yeah, otherwise there would be no visualization.

Think about it: they say 19334 objects are tracked. Imagine that many cars or trucks in the world scattered all across. Then extrude that to couple hundreds of kilometers. Would that feel congested to you? 19334 new cars are being manufactured in less than 2,5 hours...

Re: Low Earth Orbit Visualization

#69
post #28

Those long, straight-line convoys of Starlink satellites are fascinating. There's a few of them I could see scattered around the Earth. At what point do they start breaking up into unrelated orbits? Looking forward to using this website to try spotting satellites at night. There's something strangely thrilling about seeing objects in the night sky that were placed there by people.

> At what point do they start breaking up into unrelated orbits?

It's not as easy to see as in this visualization, but Jonathan McDowell (https://twitter.com/planet4589) posts graphs on his website of each launch of starlink satellites as they raise orbits. https://planet4589.org/space/stats/star/starstats.html

Scroll down to the individual launches and there's images you can click on of the orbit raising progress of each launch.

Example of the Starlink 4-21 mission that launched on July 7th of this year: https://planet4589.org/space/stats/star/spl51.jpg (One satellite failed, which isn't that unusual, and will de-orbit probably sometime early next year if they don't recover it.)

Re: Low Earth Orbit Visualization

#70
I guess this is US only? The site is horribly broken upon loading. Only after using developer tools I discovered that all scripts and assets return 403 - CloudFront configured to block your country.

Edit: I'm in Hong Kong.

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