Low Earth Orbit Is 2.8 Days from Disaster. Who Pays for the Cleanup?

Every 22 seconds, two tracked objects in low Earth orbit pass close enough to each other that, under slightly different circumstances, they'd collide.

That number comes from the latest conjunction analysis data, and it's gotten worse fast. In 2018, the conditional time to first catastrophic collision — a metric researchers at TU Braunschweig call the "CRASH Clock" — sat at 121 days. By 2024, that number had dropped to 2.8 days.

Let's be absolutely clear about what that means and what it doesn't. The CRASH Clock measures a conditional scenario: if every satellite and rocket body in low Earth orbit simultaneously lost collision avoidance capability, how long before two objects collide catastrophically? It's not a prediction. It's a stress test — the orbital equivalent of asking "how long can you drive on the highway blindfolded before hitting someone?"

The answer, as of the latest Thiele et al. analysis, is 2.8 days. That number should be read as a measure of how congested the orbital environment has become, not as a countdown to disaster. But it's a measure that should trouble anyone thinking about the financial sustainability of space operations.

The Numbers Keep Getting Bigger

The European Space Agency's 2025 Space Environment Report tallied the orbital population at 40,230 tracked objects. "Tracked" is the key qualifier. Below the tracking threshold — roughly 10 centimeters in low Earth orbit — ESA estimates 1.2 million objects larger than 1 centimeter, and 140 million fragments in total. Each one of those 1.2 million centimeter-scale fragments carries enough kinetic energy to disable or destroy an operational satellite.

Between 2023 and 2024, 7,473 new tracked objects were added — the largest single-year increase in the space age, driven primarily by the continued expansion of mega-constellations. SpaceX's Starlink network alone accounts for more than 6,000 active satellites in low Earth orbit, with plans for 12,000 and regulatory filings suggesting up to 42,000.

To put this growth rate in context: the entire tracked orbital population in 2000 was about 9,000 objects. We've added more than that in two years.

What a 24-Hour Outage Would Mean

The Thiele study also modeled shorter disruption windows. If collision avoidance maneuvers ceased for 24 hours — due to a cyberattack on satellite operations centers, a space weather event degrading tracking capability, or a terrestrial conflict disrupting ground infrastructure — the probability of a major collision exceeds 30%.

Thirty percent in 24 hours. For context, the insurance industry typically begins mandatory catastrophe modeling at probability thresholds far below that.

A single catastrophic collision wouldn't end spaceflight. But it would generate thousands of new debris fragments, each capable of triggering further collisions. This cascading process — first described by NASA scientist Donald Kessler in 1978, and now universally called Kessler Syndrome — wouldn't be instantaneous. The popular image of a sudden, explosive chain reaction that renders orbit unusable within hours is Hollywood fiction. The actual process would unfold over years to decades, gradually increasing collision rates, raising insurance costs, shortening satellite lifespans, and eventually making certain orbital regimes economically impractical.

Gradual doesn't mean painless. A 2024 IEEE Spectrum analysis estimated that even a modest increase in the background debris collision rate — say, a doubling from current levels — could increase satellite insurance premiums by 300-500% for low-orbit missions, effectively pricing smaller operators out of the market.

The Insurance Market's Blind Spot

The global space insurance market reached an estimated $4.43 billion in premiums in 2026 and is projected to grow to $6.23 billion by 2030. That sounds substantial until you consider what it actually covers.

Space insurance today is structured around individual missions. A launch policy covers the ride to orbit. An in-orbit policy covers the satellite's operational life against hardware failure, debris impact, and other specified perils. If your satellite gets hit by a piece of debris, your policy pays out for your loss.

What no policy covers is the systemic risk — the scenario where one collision generates enough debris to damage or destroy multiple satellites, each insured separately, in a cascade whose total cost dwarfs the premium base of the entire market.

This is not a theoretical concern. The Iridium 33/Cosmos 2251 collision in 2009 generated over 2,300 trackable fragments, many of which remain in orbit today. If a similar event occurred in a denser orbital shell — say, the 550-kilometer altitude where Starlink operates — the debris cloud could threaten hundreds of operational satellites within months.

The insurance market has no mechanism for this. There's no space catastrophe bond. No systemic risk pool. No reinsurance backstop for correlated losses across the orbital population. Each satellite is insured as if its risk is independent, when the entire premise of Kessler Syndrome is that it isn't.

The Liability Void

Make the insurance problem worse: even if you could assign blame for a debris-generating collision, the legal framework for liability in space is a relic of 1972.

The Liability Convention, formally the Convention on International Liability for Damage Caused by Space Objects, establishes two liability regimes. For damage on Earth's surface, the launching state bears absolute liability — no fault required. For damage in space, liability is fault-based — you have to prove negligence.

That fault-based standard was designed for an era of a few hundred objects in orbit, all operated by governments. It breaks down completely when applied to a debris field. If a fragment from a 2021 Russian anti-satellite test strikes a piece of a 2009 collision-generated debris cloud, which then strikes an active Starlink satellite, producing fragments that damage a European weather satellite — who is at fault? Under current law, good luck proving it.

As a Stanford Law School analysis from August 2025 titled "Who Takes Out the Trash in Space?" concluded, the existing liability framework provides essentially no incentive for debris remediation and no clear mechanism for allocating cleanup costs. The 1972 Convention was drafted for bilateral incidents between state actors. The orbital debris problem is a multilateral commons tragedy involving commercial operators, government agencies, and debris from defunct programs spanning six decades.

What Systemic Risk Pricing Would Require

If you were designing a space insurance market from scratch today, knowing what we know about orbital dynamics and debris proliferation, it wouldn't look like what we have.

It would start with an orbital-environment premium — a surcharge on every insured satellite, scaled to orbital altitude and inclination, reflecting that satellite's contribution to and exposure from the ambient debris risk. A satellite at 550 km in a congested shell would pay more than one at 400 km in a cleaner regime. This premium would flow into a systemic risk pool, essentially a catastrophe reserve fund for correlated debris losses.

Second, you'd want debris remediation bonds. Every operator launching a constellation above a certain size — say, 100 satellites — would be required to post a bond covering the estimated cost of active debris removal for their constellation in case they go bankrupt before deorbiting it. OneWeb's 2020 bankruptcy, during which its 74 operational satellites temporarily had no funded deorbit plan, illustrated why this matters.

Third, the market needs parametric triggers. A space debris catastrophe bond, triggered by a measured increase in the tracked debris population above a defined threshold (say, a 20% single-event increase, indicating a major fragmentation), could mobilize capital market investment in orbital sustainability. The trigger data — tracked object counts — is publicly available from the U.S. Space Surveillance Network and ESA.

Fourth, active debris removal needs a business model. Several companies — Astroscale, ClearSpace, and others — have demonstrated prototype technologies for removing defunct objects from orbit. What they lack is a paying customer. If the insurance market priced systemic risk correctly, removing a high-risk derelict object would produce a quantifiable reduction in premiums for surrounding operational satellites, creating a revenue stream for cleanup operators. Right now, cleanup is a cost. Proper risk pricing would make it an investment.

The Tragedy of the Commons, at 28,000 Kilometers Per Hour

Orbital space is a commons. No one owns it, everyone uses it, and the cost of degrading it is borne collectively while the benefits of using it accrue individually. This is the textbook setup for a tragedy of the commons, and the textbook solution is some combination of regulation, pricing, and enforceable property rights.

We're in the early stages of regulation — the FCC's 5-year deorbit rule, the EU Space Act proposal, various national frameworks. We have zero pricing of the commons — no operator pays for the orbital capacity they consume or the risk they impose on others. And property rights in orbit remain a legal fiction.

The CRASH Clock at 2.8 days is a thermometer reading. It's telling us the patient's temperature is rising. The space insurance market at $4.43 billion is the medicine cabinet — stocked for headaches, not for what's coming.

Twenty-two seconds between close approaches. 7,473 new objects last year. 2.8 days of margin.

The math is going in one direction, and nobody has written the check to bend the curve.