Long before the International Space Station reaches the end of its life, more than 263 other spacecraft had already been deliberately sent into the remote South Pacific.
That number makes Point Nemo sound like an underwater museum: rows of dead satellites and space stations resting around a single coordinate. The reality is more dispersed. Most of each vehicle burned or broke apart in the atmosphere, and surviving pieces fell across long, separately targeted corridors in a broad region of ocean.
Point Nemo is the landmark. The South Pacific Ocean Uninhabited Area is the working disposal zone.
In my earlier article on the ISS deorbit plan, I focused on the vehicle NASA has commissioned to control the station’s final descent. This follow-up looks at the re-entries that made the region part of spaceflight history first.
The count is a historical floor, not a live scoreboard
A 2025 academic study of Point Nemo as a cultural landscape cites more than 263 space objects deliberately sent into the surrounding uninhabited ocean between 1971 and 2018. The list includes the Mir space station, six Salyut stations, around 140 Russian resupply vehicles, six Japanese cargo craft and five European Space Agency transfer vehicles.
I would resist turning 263 into an exact current total. Controlled re-entries have continued, while accounts often count spacecraft and rocket components differently. A vehicle that fragments into hundreds of pieces is still normally counted as one spacecraft.
The safest reading is that at least 263 spacecraft had been intentionally disposed of there by 2018. The total before the ISS arrives will be higher, but a precise current number would imply certainty the records do not provide.
Point Nemo is a coordinate, not the entire cemetery
NOAA places Point Nemo at 48 degrees 52.6 minutes south, 123 degrees 23.6 minutes west. It is about 2,688 kilometres from the nearest land in three directions, making it the oceanic point farthest from land.
Controllers do not aim every vehicle at the coordinate itself. They target an uninhabited ocean stretch with room for uncertainties in atmospheric conditions, breakup and direction of travel.
A spacecraft still moves at orbital speed when it meets the atmosphere. Its fragments continue downrange while heating, separating and slowing, producing a long debris footprint rather than dropping vertically into one patch of water.
Mir provided the closest large-scale rehearsal so far
The most substantial predecessor was Russia’s Mir station. After 15 years in orbit, it underwent a controlled re-entry on 23 March 2001. A docked Progress vehicle performed a sequence of burns, and surviving debris landed in the South Pacific east of New Zealand.
NASA’s history of the operation describes how atmospheric drag lowered Mir before three planned burns committed it to re-entry. The station began disintegrating at roughly 80 kilometres.
Mir showed that a large station could be guided away from populated land, but it was much lighter than the ISS. NASA puts Mir’s mass at about 286,000 pounds, or roughly 130 tonnes. The ISS exceeds 900,000 pounds and has a far larger, more complicated arrangement of trusses, radiators, solar arrays and pressurised modules.
Cargo vehicles made destructive re-entry routine
The cemetery was built as much by ordinary logistics as by famous space stations. Cargo craft carried supplies to orbit, were filled with rubbish after unloading, and then became disposable containers whose final manoeuvres could be planned precisely.
ESA’s first Automated Transfer Vehicle, Jules Verne, offers a documented example. After serving the ISS in 2008, a final burn reduced its speed by 70 metres per second. ESA says it entered the atmosphere at 120 kilometres, broke apart near 75 kilometres and dropped its remaining fragments into the Pacific 12 minutes later.
Aircraft and instruments watched that descent to compare the actual breakup with computer models. Every well-observed re-entry helps engineers estimate which components survive, how far they travel and how large a safety corridor needs to be.
That learning matters because “burned up” is rarely literal for an entire large spacecraft. Aluminium structures may melt or fragment, but dense tanks, machinery and heat-resistant components can reach the surface.
The ISS will be an addition unlike any other
NASA plans to operate the ISS through 2030 and then conduct a controlled re-entry, although the exact date remains dependent on programme decisions and readiness. In 2024 it selected SpaceX to develop the U.S. Deorbit Vehicle under a contract worth up to $843 million.
NASA’s current transition FAQ says atmospheric drag will lower the station as far as practical before the final vehicle shapes its ground track and performs a large re-entry burn. Most hardware is expected to melt, burn or vaporise, but denser fragments should survive and settle on the seabed inside an uninhabited ocean region.
NASA’s environmental assessment expects no substantial long-term effects. That is a forecast based on the materials, breakup and remoteness involved, not a claim that ocean disposal has no effect whatsoever.
I find that distinction worth keeping. Controlled ocean disposal is chosen because it sharply reduces the danger to people compared with an uncontrolled fall across inhabited latitudes. It is a risk-management decision, not a pristine ending.
A cemetery defined more by trajectories than wrecks
The most revealing thing about the 263-plus spacecraft is not that so many objects may have fragments on the seabed. It is that controlled re-entry has become an established final phase of operating large vehicles in low Earth orbit.
Point Nemo lends the practice a memorable name. The engineering reality is a collection of different trajectories, dates and debris footprints spread across an enormous ocean area.
When the ISS eventually descends, it will not land on top of Mir or join a neat cluster of 263 intact machines. It will follow the same basic principle those earlier missions established: maintain control, use the atmosphere to destroy as much hardware as possible, and direct what survives towards the part of Earth where it poses the least risk to people.
