NASA
Sometime next year, SpaceX will begin returning its Dragon crew and cargo capsules to splashdowns in the Pacific Ocean and end recoveries of the spacecraft off the coast of Florida.
This will allow SpaceX to make changes to the way it brings Dragons back to Earth and eliminate the risk, however tiny, that a piece of debris from the ship’s trunk section might fall on someone and cause damage, injury, or death.
“After five years of splashing down off the coast of Florida, we’ve decided to shift Dragon recovery operations back to the West Coast,” said Sarah Walker, SpaceX’s director of Dragon mission management.
Public safety
In the past couple of years, landowners have discovered debris from several Dragon missions on their property, and the fragments all came from the spacecraft’s trunk, an unpressurized section mounted behind the capsule as it carries astronauts or cargo on flights to and from the International Space Station.
SpaceX returned its first 21 Dragon cargo missions to splashdowns in the Pacific Ocean southwest of Los Angeles. When an upgraded human-rated version of Dragon started flying in 2019, SpaceX moved splashdowns to the Atlantic Ocean and the Gulf of Mexico to be closer to the company’s refurbishment and launch facilities at Cape Canaveral, Florida. The benefits of landing near Florida included a faster handover of astronauts and time-sensitive cargo back to NASA and shorter turnaround times between missions.
The old version of Dragon, known as Dragon 1, separated its trunk after the deorbit burn, allowing the trunk to fall into the Pacific. With the new version of Dragon, called Dragon 2, SpaceX changed the reentry profile to jettison the trunk before the deorbit burn. This meant that the trunk remained in orbit after each Dragon mission, while the capsule reentered the atmosphere on a guided trajectory. The trunk, which is made of composite materials and lacks a propulsion system, usually takes a few weeks or a few months to fall back into the atmosphere and doesn’t have control of where or when it reenters.
Air resistance from the rarefied upper atmosphere gradually slows the trunk’s velocity enough to drop it out of orbit, and the amount of aerodynamic drag the trunk sees is largely determined by fluctuations in solar activity.
SpaceX and NASA, which funded a large portion of the Dragon spacecraft’s development, initially determined the trunk would entirely burn up when it reentered the atmosphere and would pose no threat of surviving reentry and causing injuries or damaging property. However, that turned out to not be the case.
In May, a 90-pound chunk of a SpaceX Dragon spacecraft that departed the International Space Station fell on the property of a “glamping” resort in North Carolina. At the same time, a homeowner in a nearby town found a smaller piece of material that also appeared to be from the same Dragon mission.
These events followed the discovery in April of another nearly 90-pound piece of debris from a Dragon capsule on a farm in the Canadian province of Saskatchewan. SpaceX and NASA later determined the debris fell from orbit in February, and earlier this month, SpaceX employees came to the farm to retrieve the wreckage, according to CBC.
Pieces of a Dragon spacecraft also fell over Colorado last year, and a farmer in Australia found debris from a Dragon capsule on his land in 2022.