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‘Out-of-control’ Chinese rocket falling to Earth could partially survive re-entry
Part of a huge rocket that launched China’s first module for its Tianhe space station is falling back to Earth and could make an uncontrolled re-entry at an unknown landing point.
The 30-metre high core of the Long March 5B rocket launched the “Heavenly Harmony” unmanned core module into low Earth orbit on 29 April from Wenchang in China’s Hainan province.
The Long March 5B then itself entered a temporary orbit, setting the stage for one of the largest ever uncontrolled re-entries. Some experts fear it could land on an inhabited area.
“It’s potentially not good,” said Jonathan McDowell, Astrophysicist at the Astrophysics Center at Harvard University.
“Last time they launched a Long March 5B rocket they ended up with big long rods of metal flying through the sky and damaging several buildings in the Ivory Coast,” he said.
“Most of it burned up, but there were these enormous pieces of metal that hit the ground. We are very lucky no one was hurt.”
On Tuesday the core was orbiting Earth around every 90 minutes at about 27,600km/h and an altitude of more than 300km. The US military has named it 2021-035B
Since the weekend it has dropped nearly 80km in altitude and SpaceNews reported that amateur ground observations showed it was tumbling and not under control. This, and its speed, makes it impossible to predict where it will land when Earth’s atmosphere eventually drags it down, though McDowell said the most likely outcome is that it will fall into the sea, as the ocean covers about 71% of the planet.
A large Chinese rocket is set to make an uncontrolled reentry back into Earth's atmosphere, but it is not yet clear exactly where or when the debris will hit our planet.
China's Long March 5B rocket is "unpredictably" falling back to Earth after launching a part of the new T-shaped Chinese space station on Thursday local time in Wenchang, according to SpaceNews. The 22.5-metric-ton Tianhe space station module is in its correct orbit after separating as planned from the core stage of the rocket, which is now expected to re-enter in a few days or about a week.
That said, the more likely possibility is the core stage will fall in an uninhabited place like Earth's oceans, which cover 70% of the
"The high speed of the rocket body means it orbits the Earth roughly every 90 minutes and so a change of just a few minutes in reentry time results in reentry point thousands of kilometers away," SpaceNews said, adding that the object's orbital inclination of 41.5 degrees means it "passes a little farther north than New York, Madrid and Beijing and as far south as southern Chile and Wellington, New Zealand, and could make its reentry at any point within this area."
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