A New Rule for a Crowded Sky
The Federal Communications Commission (FCC) adopted a rule requiring satellite operators to dispose of their satellites within five years of mission completion. This mandate applies to all satellites, both US-licensed and foreign-owned, that end their missions
in or pass through low-Earth orbit (LEO)—an altitude below 2,000 kilometers. The rule officially became mandatory for all new license applications filed after September 29, 2024, following a two-year transition period. This decisive action replaces a decades-old, non-binding guideline and establishes a firm deadline, signaling a new era of accountability for the booming commercial space industry.
The Growing Threat of Space Debris
Low-Earth orbit is increasingly cluttered with defunct satellites, spent rocket stages, and fragments from past collisions. These objects, collectively known as space debris or 'space junk', travel at speeds over 27,000 km/h. At that velocity, even a tiny fleck of paint can inflict catastrophic damage on an active satellite or a crewed spacecraft. Scientists have long warned of a theoretical cascade called the Kessler Syndrome, where a single collision creates a debris field that triggers more collisions, eventually rendering entire orbital altitudes unusable for generations. With the number of tracked debris objects increasing dramatically in recent years, the risk is no longer theoretical.
From 25 Years to Just Five
For decades, the international guideline for post-mission satellite disposal was 25 years. This standard was established when space was a far less crowded domain, dominated by a few government actors launching large satellites into very high orbits. However, the recent explosion of commercial LEO 'megaconstellations'—like SpaceX's Starlink—has made the 25-year timeline dangerously obsolete. Leaving thousands of defunct satellites to decay naturally over a quarter-century would dramatically increase the probability of collisions. The FCC concluded that it was no longer sustainable to let old satellites linger for decades in these critical orbital highways.
Impact on the Satellite Industry
The five-year rule has significant implications for the business models of satellite operators. Companies must now design, build, and operate their spacecraft with a clear end-of-life plan. For some, like SpaceX, this aligns with their existing strategy. The company has stated its satellites are designed for a five-year lifespan and proactively deorbits them, often in large batches, using onboard propulsion to ensure they burn up in the atmosphere. However, other players, like Amazon's Project Kuiper, have argued the rule is too rigid. They contend that a strict timeline unfairly penalizes operators for satellite failures that may be beyond their control and have pushed for a more flexible approach based on a satellite's nominal design capabilities.
The Engineering of a Safe Return
Getting a satellite out of orbit isn't always simple. Operators must include a reliable method for post-mission disposal in their plans submitted to the FCC. The most common method is a controlled deorbit, where the satellite uses its remaining onboard fuel to fire its thrusters, slowing itself down and falling into a planned trajectory to burn up harmlessly in Earth's atmosphere. This requires satellites to retain enough fuel and functionality at the end of their service life. Another option is passive deorbiting, where a satellite might deploy a drag-enhancing device, like a sail, to increase atmospheric resistance and speed up its orbital decay. These requirements add cost and complexity to satellite design but are now a non-negotiable part of operating in LEO.
