The Long March was the second deployment of the 5B variant since its maiden flight in May 2020. Last year, pieces from the first Long March 5B fell on Ivory Coast, damaging several buildings. No injuries were reported.
“Spacefaring nations must minimise the risks to people and property on Earth of re-entries of space objects and maximize transparency regarding those operations,” NASA Administrator Bill Nelson, a former senator and astronaut who was picked for the role in March, said in a statement after the re-entry.
“It is clear that China is failing to meet responsible standards regarding their space debris.”
With most of the Earth’s surface covered by water, the odds of populated area on land being hit had been low, and the likelihood of injuries even lower, according to experts.
But uncertainty over the rocket’s orbital decay and China’s failure to issue stronger reassurances in the run-up to the re-entry fuelled anxiety.
“It is critical that China and all spacefaring nations and commercial entities act responsibly and transparently in space to ensure the safety, stability, security, and long-term sustainability of outer space activities,” Nelson said.
Harvard-based astrophysicist Jonathan McDowell told Reuters that the potential debris zone could have been as far north as New York, Madrid or Beijing, and as far south as southern Chile and Wellington, New Zealand.
Since large chunks of the NASA space station Skylab fell from orbit in July 1979 and landed in Australia, most countries have sought to avoid such uncontrolled re-entries through their spacecraft design, McDowell said.
“It makes the Chinese rocket designers look lazy that they didn’t address this,” said McDowell.
The Global Times, a Chinese tabloid, dismissed as “Western hype” concerns the rocket was “out of control” and could cause damage.
“It is common practice across the world for upper stages of rockets to burn up while reentering the atmosphere,” Wang Wenbin, a spokesman at China’s foreign ministry, said at a regular media briefing on May 7.
“To my knowledge, the upper stage of this rocket has been deactivated, which means most of its parts will burn up upon re-entry, making the likelihood of damage to aviation or ground facilities and activities extremely low,” Wang said at the time.
The rocket, which put into orbit an unmanned Tianhe module containing what will become living quarters for three crew on a permanent Chinese space station, will be followed by 10 more missions to complete the station by 2022.
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