Experts Warn 15,000 Satellites Near Unsustainable Orbit Limits as 2 Million More Are Planned
Updated
Updated · Scientific American · Aug 18
Experts Warn 15,000 Satellites Near Unsustainable Orbit Limits as 2 Million More Are Planned
1 articles · Updated · Scientific American · Aug 18
Summary
About 15,000 satellites already in orbit are pushing low-Earth space toward unsafe congestion, experts say, with nearly 2 million more proposed and some researchers arguing key altitudes above 550 kilometers have already crossed a critical debris threshold.
10,000 active Starlink satellites now dominate the surge, and collision management is already intensive: SpaceX says the constellation performs about 1,000 avoidance maneuvers a day after dodging roughly 300,000 potential collisions last year.
29% is the estimated chance of a collision this year at 975 kilometers, one of the riskiest bands because of large dead rocket stages; a major crash there could scatter long-lived debris and make some orbits prohibitively costly.
Less than 3 days is the revised estimate from the new CRASH Clock for when a collision would occur if all satellites suddenly failed, down from five days as launches accelerate and records set in 2022-2025 are on track to fall again.
1967 space rules and the ITU's current process have not kept pace with megaconstellations, leaving regulators to debate fixes only at a 2027 conference while astronomers warn that 500,000 to 1 million satellites could overwhelm telescope images and even outnumber visible stars.