By
@emin
This is a 3D orbital simulator tracking real time space objects, replaying historical collisions and it shows close approachings between satellites. I aimed to create an awareness for the congestion of Earth orbit.
@emin
on
Orbital Congestion Simulator
5h 4m 14s logged
After many shipping, I needed to rewrite most of codes in my project to decrease the AI usage. I had to delete some features like historical events and close approaches which are generated by AI. Now, my project is more specific. That’s how it looks like right now.
@emin
on
Orbital Congestion Simulator
2h 6m 50s logged
For my latest update on the Orbital Congestion Simulator, I focused on building a tool that looks beyond today’s telemetry: the Kessler Syndrome Projection panel.Instead of just showing current satellite positions, this feature lets you model the future of Low Earth Orbit. You can test pre-set scenarios like Megaconstellation Boom, Green Space, or ASAT War, or tweak custom parameters directly:Launch Rate: Multiplier for annual launchesMitigation Rate: Success rate of post-mission disposalCollision Risk: Probability of cascading orbital collisionsThe engine calculates real-time updates for total object counts, debris volume, collision metrics, and distribution across LEO, MEO, and GEO regimes. You can also hit Play to watch the timeline scrub forward as orbital density builds up.
@emin
on
Orbital Congestion Simulator
24m 31s logged
One of my project’s important feature is showing the real close approaches between two satellite in next 24 hours.
Click any alert card on the demo if the list isn’t empty. If it says scanning, give it a minute to find close approaches.
@emin
on
Orbital Congestion Simulator
What did you make?
A browser app that shows how crowded Earth orbit really is. You get a live 3D globe with thousands of satellites and debris from CelesTrak TLEs, filters, close-approach alerts, replays of real incidents, a simple Kessler “what if” panel, and on phones a Satellite Spotter that uses the sensors so you can aim at what’s actually overhead.
What was challenging?
Keeping ~12k objects moving without melting the browser. Propagation had to go into a worker, and close approaches were annoying because fast LEO crossings can vanish between frames if you sample too coarsely. Also burned myself once when an automated TLE refresh wrote a half-empty catalog (almost no stations) and the live site looked broken until I added hard minimums so thin fetches can’t ship.
What are you proud of?
That it feels like a real tool, not a slideshow. VERIFY mode for close approaches, the historical replays, and Spotter on a phone are the parts I keep showing people. Also getting five languages working and not letting the UI rot when the catalog updates.
What should people know so they can test your project?
Open the live demo on desktop first: https://orbital-congestion-simulator.vercel.app
Skip or finish the short tour, turn on Color by Function, click a few objects, try a Historical Event, and open a close-approach card if any are listed. On a phone, pick something bright like the ISS and hit Spot — allow location/motion, go outside if the compass is weird, and do a figure-eight with the phone to recalibrate. Positions come from periodic TLEs + SGP4, not a live tracking API, so treat it as educational. Repo: https://github.com/muhammet842/orbital-congestion-simulator
@emin
on
Orbital Congestion Simulator
1h 58m 7s logged
A phone feature inside Orbital Congestion Simulator: pick a satellite, point your camera at the sky, and follow the on-screen guide until it matches what’s overhead — using GPS, compass, and live TLE positions.
@emin
on
Orbital Congestion Simulator
19h 47m 43s logged
I’ve been building Orbital Congestion Simulator for a while now. It shows thousands of satellites and debris around Earth in 3D, using real TLE data from CelesTrak and SGP4 to calculate their positions.
You can filter by orbit, select objects for details, check close approaches, replay historical collisions such as Iridium 33 and Cosmos 2251, and explore a simple Kessler Syndrome future projection. The interface is also available in several languages.
