Space Debris and Space Traffic Management: The 2026 Guide

Everything humanity has launched is still up there, or its fragments are. This guide counts it from the public catalogue every morning, explains why the count matters, walks through how operators avoid each other, sets out the rules that now apply, and looks at who is trying to clean up.

Updated: October 2026|By SpaceNexus Desk|12 min read

The short answer

Low Earth orbit is crowded but not yet closed. Space surveillance networks regularly track about 47,020 objects (ESA, October 2026), and models estimate some 230 million fragments too small to track. Two events, a Chinese anti-satellite test in 2007 and the Iridium-Cosmos collision in 2009, accounted for about half of the catalogued population below 1,000 km in January 2013, NASA found. The 700-1,000 km band may already be past the point where collisions breed faster than drag cleans up; the 400-600 km shells where Starlink and Amazon Leo fly are self-cleaning within years, which is why regulators have pushed operators lower.

Space traffic management, meanwhile, is not a system so much as a practice: the U.S. Space Force screens the catalogue, sends free conjunction warnings to anyone who registers, and each operator decides for itself whether to move. The FCC's 5-year deorbit rule is the sharpest regulation in force anywhere; most international frameworks remain voluntary. Active debris removal has been demonstrated in orbit but is not yet a business. That is the state of play; the rest of this guide is the detail.

How much is up there (live)

Counted from the public satellite catalogue (CelesTrak SATCAT) in our daily snapshot of October 17, 2026:

Tracked objects

35,044

everything in the catalogue

Payloads

20,149

working and defunct satellites

Rocket bodies

2,297

spent stages

Debris fragments

12,543

tracked junk

By orbit: 29,234 objects in low Earth orbit, 3,585 in medium Earth orbit and 1,771 at geostationary altitude. The full breakdown, refreshed every morning, is on How many satellites are in orbit?

Conjunction assessment and collision avoidance

“Space traffic management” today means conjunction assessment. The U.S. Space Force's 18th Space Defense Squadron runs the Space Surveillance Network (radars such as the AN/FPS-85 in Florida and the Space Fence on Kwajalein, plus the GEODSS telescopes for high orbits) maintains the catalogue, and screens every object against every other. When two are predicted to pass within a threshold (typically about 1 km), the operator receives a Conjunction Data Message with the time of closest approach, miss distance, probability of collision, and the covariance, the position and velocity uncertainty, for both objects. The service is free to any operator registered on Space-Track.org, commercial or foreign.

The volume is large, and the vast majority of warnings never require action. The decision is probabilistic. Uncertainty in both objects' orbits is large relative to the miss distance, so operators set a probability threshold and manoeuvre when a conjunction crosses it. Starlink automates this and performs thousands of avoidance manoeuvres a year; the ISS performs its debris avoidance manoeuvres as planned operations, each one coordinated with visiting vehicles and crew schedules.

The weaknesses of the system are structural. There is no traffic controller: each operator decides independently, and two operators with satellites on a collision course have no binding rule for who moves. Government catalogue accuracy is limited, which is why commercial providers (LeoLabs, ExoAnalytic, Slingshot Aerospace and others) sell higher-accuracy tracking and faster warnings, and why the Space Force budget now buys commercial data. Formal space traffic management (traffic rules for orbit, analogous to air traffic control) remains under international discussion, and the U.S. Office of Space Commerce is building civil space situational awareness capabilities meant to take on the civil-operator workload.

The rulebook: the FCC 5-year rule and beyond

The most consequential debris regulation in force anywhere is the FCC's 5-year post-mission disposal rule, Report and Order 22-74, adopted in September 2022. Satellites in or passing through LEO must deorbit within 5 years of completing their mission, down from the 25-year guideline the Inter-Agency Space Debris Coordination Committee adopted in 2002. Satellites already in orbit in 2022 were exempt, and satellites already authorized but not yet launched got a two-year grandfathering period, so those launched after September 29, 2024 must comply, as must new licensees. Because market access covers any satellite serving U.S. customers, it reaches foreign operators too. Applicants must show a credible deorbit plan, and the FCC can deny, condition or revoke authorisations for non-compliance. The first enforcement action came in 2023, when Dish Network was fined $150,000 over a disposal failure.

The rule has already changed how satellites are designed. Above roughly 500 km, natural decay takes longer than 5 years, so satellites there now need propulsion, or a drag sail, to comply; below 400 km, drag does the work but station-keeping costs more fuel during the mission. CubeSats that used to fly without propulsion must either add it or fly lower. And the compliance economics differ sharply by altitude: a constellation at 550 km has an easy path, one at 1,200 km, where natural decay takes decades, does not.

The FAA went the other way. In March 2026 it withdrew its proposed rule that would have required launch operators to dispose of upper stages within 25 years, after industry argued the timeline was already obsolete next to the FCC's and that two agencies with overlapping rules would conflict. The FAA keeps its authority to attach debris conditions to individual launch licences; there is simply no blanket upper-stage rule.

Internationally, almost everything is voluntary. The UN COPUOS guidelines (2007) and Long-term Sustainability guidelines (2019) recommend limiting released debris, preventing post-mission breakups, disposing of spacecraft and avoiding collisions, but bind no one until a national regulator adopts them. ESA's Zero Debris Charter commits ESA and signatories to generating no new debris by 2030 and covers active removal and design-for-demise. ISO 24113 is increasingly cited in national licence conditions, and the ITU's spectrum coordination process now asks for disposal plans, an indirect lever. The result, as our regulatory coverage notes, is asymmetry: U.S.-licensed operators face stricter rules than competitors launching under lighter regimes. Track rulemaking in the Compliance Hub.

Active debris removal: who is building it

Removal is technically proven and commercially unproven. Astroscale (Japan/UK) is the furthest along: ELSA-d, launched in 2021, captured and released a cooperative target with a magnetic docking plate multiple times; ADRAS-J, launched in 2024, performed the first rendezvous and proximity operation with a real, tumbling piece of debris, a Japanese H-2A upper stage, and imaged it from metres away; ELSA-M, a 520 kg servicer that will capture and remove an end-of-life Eutelsat OneWeb satellite, is to launch on an Isar Aerospace Spectrum rocket (contract announced March 16, 2026), in “FY2028 or later” according to Astroscale, as European Spaceflight reported. Company profile.

ClearSpace (Switzerland) provides the capture system for ESA's ClearSpace-1, which ESA now leads with OHB as prime contractor: four robotic arms will capture ESA's 95 kg PROBA-1 satellite, launched in 2001, and bring it down. ESA changed the target from a Vega payload adapter in 2024 and lists the launch as planned for 2029. See our ClearSpace vs Astroscale comparison. Around them, Orbit Fab is building the refuelling infrastructure (its RAFTI port and depots) that would let a servicer remove several objects per mission; TransAstra is developing inflatable capture bags suited to large, tumbling rocket bodies; and Neumann Space (Australia) is developing ion thrusters that run on metal processed from captured debris.

The obstacle is the business model: a textbook tragedy of the commons, where everyone benefits from a cleaner orbit and no one has enough incentive to pay for it. Candidate models include government procurement (ESA and JAXA are buying demonstrations; the Zero Debris Charter creates demand for European-origin cleanup), insurance-funded removal as a cheaper alternative to collision payouts, compliance-driven demand from operators whose own deorbit systems fail, bundling removal with satellite servicing, and per-satellite sustainability fees. None of these is yet a proven business.

Frequently asked

How many pieces of space debris are there?

Space surveillance networks regularly track and catalogue about 47,020 objects, according to ESA's Space Debris Office (statistics updated October 9, 2026); the live count from the public catalogue is at the top of this guide. Below the tracking threshold, ESA's MASTER-8 model (February 2026 population) estimates about 1.5 million debris objects between 1 and 10 cm and about 230 million between 1 mm and 1 cm: untrackable, but fast enough to damage a spacecraft.

What is the Kessler syndrome?

A scenario described by NASA scientist Donald Kessler in 1978 in which the density of objects in an orbital band becomes high enough that collisions generate fragments faster than atmospheric drag removes them, so the debris population grows on its own even with no new launches. Modelling suggests the 700-1,000 km band may already be at or near that threshold; the lower shells where most mega-constellations fly are self-cleaning by comparison.

What is the FCC 5-year rule?

FCC Second Report and Order 22-74, adopted September 29, 2022, requires satellites in or passing through low Earth orbit to deorbit within 5 years of the end of their mission, replacing the old 25-year guideline. Satellites already in orbit were exempt; satellites already authorized but not yet launched got a two-year grandfathering period from September 29, 2022, so those launched after September 29, 2024 must comply, as must new licensees. Because market access covers satellites serving U.S. customers, it reaches foreign operators too.

What is a conjunction data message?

A CDM is the warning an operator receives when two catalogued objects are predicted to pass within a screening volume. It carries the time of closest approach, the miss distance, a probability of collision, and the position and velocity uncertainty for both objects. The U.S. Space Force issues them free to registered operators through Space-Track.org.

Which companies remove space debris?

Astroscale is the furthest along: ELSA-d demonstrated magnetic capture in 2021 and ADRAS-J rendezvoused with a real H-2A upper stage in 2024, with ELSA-M, which will capture and remove an end-of-life Eutelsat OneWeb satellite, to launch on an Isar Aerospace rocket in "FY2028 or later", according to Astroscale as reported by European Spaceflight. ESA's ClearSpace-1, led by OHB with ClearSpace providing capture, is planned for 2029 to remove ESA's 95 kg PROBA-1 satellite. Orbit Fab (refuelling), TransAstra (capture bags) and Neumann Space (debris-as-propellant thrusters) are building supporting technology.

How does a satellite deorbit at end of life?

In LEO, it lowers its perigee with onboard propulsion until drag finishes the job (roughly 150-200 m/s of delta-v from an 800 km circular orbit) or, below about 400 km, simply lets drag do it. In GEO, deorbit is impractical, so satellites are raised at least 300 km into a graveyard orbit for about 10-15 m/s. Either way the spacecraft must be passivated: propellant vented, batteries discharged, pressurant released.

Newsletter

Space Debris and Space Traffic Management: The 2026 Guide

The short answer

How much is up there (live)

Where the debris came from

Kessler syndrome, explained properly