The United States National Aeronautics and Space Administration (NASA) plans to operate the International Space Station (ISS) through 2030, then complete the ISS deorbit in early 2031. A dedicated United States Deorbit Vehicle (USDV) built by Space Exploration Technologies Corp. (SpaceX) will execute the final maneuvers. Those burns will target surviving debris into a remote South Pacific ocean area far from land.
The Deorbit Plan at a Glance
The United States National Aeronautics and Space Administration (NASA) plans to operate the International Space Station (ISS) through 2030, then deorbit it in early 2031 using a dedicated United States Deorbit Vehicle (USDV) built by SpaceX. At OrbitalIntel, we track government programs and satellite infrastructure to show how complex orbital platforms reach the end of their operational life. Flight controllers will guide the surviving fragments of the outpost into a remote reach of the South Pacific Ocean, ending the station’s run as a crewed outpost.
The International Space Station has hosted international crews since the first module, Zarya, launched in November 1998. Five primary space agencies partner on the program: NASA, the State Space Corporation Roscosmos (Roscosmos), the European Space Agency (ESA), the Japan Aerospace Exploration Agency (JAXA), and the Canadian Space Agency (CSA). Decades of exposure to thermal extremes, orbital debris, and structural stress mean the hardware cannot remain occupied indefinitely.
The targeted ocean impact point sits inside the South Pacific Ocean Uninhabited Area (SPOUA), an isolated oceanic region centered near Point Nemo. Space agencies routinely aim uncrewed cargo ships and spent orbital hardware at this oceanic expanse because it offers the widest safety margin away from populated coastlines and commercial sea lanes. Controlled atmospheric reentry protects populations on the ground while clearing low Earth orbit of massive surplus hardware.
Why the Station Cannot Stay in Orbit
A massive structure left unattended in low Earth orbit presents an uncontrollable hazard to other spacecraft and human populations on Earth. The International Space Station orbits roughly 250 miles (about 400 km) above Earth, where thin traces of the upper atmosphere create persistent aerodynamic drag. Without active station-keeping maneuvers, this drag pulls the complex downward into an unguided, catastrophic descent.
Today, visiting cargo and crew vehicles supply regular reboosts to counteract that natural orbital decay. If operators shut off these support flights and walked away, the station would drift lower on its own until it tumbled through the atmosphere at a random point on the globe. The complex has a total mass of about 925,000 pounds, or roughly 420,000 kilograms. A random descent of that mass would drop heavy structural fragments across inhabited landmasses.
Boosting the complex into a stable storage orbit presents equal logistical barriers. Moving 420,000 kilograms upward into a higher orbit requires enormous quantities of rocket propellant that existing launch systems cannot easily deliver. Parking the outpost at higher altitudes would also create a persistent collision risk for active satellites, compounding the broader challenges detailed in our guide to space debris. A planned, powered reentry remains the only reliable method to dispose of the hardware without endangering people on the ground.
How a Controlled ISS Deorbit Works
A controlled atmospheric reentry trades passive altitude loss for a sudden, high-energy burn that forces the station down into a specific patch of ocean. The process begins by allowing the station’s altitude to decay naturally over time without relying on customary reboosts. Once atmospheric drag lowers the complex toward denser air, the dedicated deorbit craft initiates targeted engine burns to guide the path of descent.
| Mission Phase | Primary Mechanism | Target Outcome |
|---|---|---|
| Natural orbital decay | Atmospheric drag | Lower station altitude without engine burns |
| Controlled targeting | US Deorbit Vehicle propulsion | Align descent ground track toward South Pacific |
| Atmospheric breakup | Aerothermal heating and drag | Vaporize thin structural shells and solar arrays |
| Ocean impact | Ballistic water entry | Deposit dense surviving pieces near Point Nemo |
As the assembly drives through the thicker layers of the atmosphere, extreme friction and heat break apart the modules, truss segments, and solar arrays. Lighter materials like external insulation and thin aluminum skin burn away completely. Dense structures and heavy metal fittings survive the thermal pulse, continuing along a ballistic arc toward the ocean surface.
SpaceX and the US Deorbit Vehicle
Executing the final descent requires a propulsion system with enough thrust to steer the 925,000-pound complex through dense atmospheric drag. In June 2024, NASA selected Space Exploration Technologies Corp. (SpaceX) to develop the United States Deorbit Vehicle (USDV) under a contract with a stated maximum value of $843 million. SpaceX will construct the custom spacecraft, while NASA will oversee the final operational phases of the deorbit mission.
Building a craft capable of steering a 420,000-kilogram station requires substantial propellant storage and specialized thrusters. The vehicle must fire its engines to push the station onto a descent path toward the ocean target. NASA has not published every technical detail of the vehicle’s engine layout and plumbing, and readers can review updates directly at nasa.gov.
The selection of SpaceX brings commercial contracting into the final operational phase of the station program. You can learn more about how advanced thrusters and fuel systems generate the necessary force in our explainer on how rocket engines work.
What Replaces the International Space Station
Retiring the International Space Station does not mean the end of human orbital research, but it does mark a shift toward private platforms. NASA intends to transition from operating a government station to purchasing services as a commercial customer aboard private free-flying facilities. The goal is to avoid an operational gap in low Earth orbit while freeing agency budgets for deep-space exploration.
Multiple aerospace companies are developing habitats to host scientific research, industrial manufacturing, and astronaut training once the primary station reenters. Private platforms will provide continuous laboratory access at lower institutional overhead, a transformation we examine in our overview of commercial space stations. These future complexes plan to host commercial payloads, sovereign astronauts, and private visitors under long-term service agreements.
International partners are also evaluating how to divide their operational focus between commercial low Earth orbit habitats and lunar exploration. As the retirement date approaches, partner space agencies must determine how to transition existing microgravity research programs onto private platforms. Maintaining continuous access to microgravity facilities ensures that long-term biological, material, and pharmaceutical experiments continue uninterrupted.
Mission Uncertainties and Next Steps
The early 2031 target date for the ISS deorbit remains an operational estimate subject to change. Technical assessments, vehicle readiness, and geopolitical agreements across the five partner agencies will influence the final schedule. If replacement commercial platforms experience development delays, or if the station’s primary structure demonstrates acceptable health margins, partner agencies could evaluate operational adjustments before authorizing the final descent.
Readers should monitor official program milestones through NASA and partner space agencies, as technical requirements will evolve leading up to the final mission. Understanding how ground controllers safely lower and dispose of major space infrastructure highlights the engineering required to keep low Earth orbit clean. To prepare for the operational changes ahead, check the latest mission releases at nasa.gov and follow public updates on private station development.