Technology

The head of US Space Command said Wednesday he would like to see more transparency from the Chinese government on space debris, especially as one of China's newer rockets has shown a propensity for breaking apart and littering low-Earth orbit with hundreds of pieces of space junk.

Gen. Stephen Whiting, commander of US Space Command, said he has observed some improvement in the dialogue between US and Chinese military officials this year. But the disintegration of the upper stage from a Long March 6A rocket earlier this month showed China could do more to prevent the creation of space debris and communicate openly about it when it happens.

The Chinese government acknowledged the breakup of the Long March 6A rocket's upper stage in a statement by its Ministry of Foreign Affairs on August 14, more than a week after the rocket's launch August 6 with the first batch of 18 Internet satellites for a megaconstellation of thousands of spacecraft analogous to SpaceX's Starlink network.

Space Command reported it detected more than 300 objects associated with the breakup of the upper stage in orbit, and LeoLabs, a commercial space situational awareness company, said its radars detected at least 700 objects attributed to the Chinese rocket.

"I hope the next time there's a rocket like that, that leaves a lot of debris, that it's not our sensors that are the first to detect that, but we're getting communications to help us understand that, just like we communicate with others," Whiting said at an event hosted by the Mitchell Institute marking the fifth anniversary of the reestablishment of Space Command.

[...]

Last November, [U.S.] President Joe Biden and Chinese President Xi Jinping agreed to resume military-to-military communications between each nation's armed forces, which were suspended in 2022. US and Chinese military leaders have met face to face several times this year, and Jake Sullivan, Biden's national security adviser, met with Xi and Chinese military leaders this week in Beijing. The meetings have focused on terrestrial concerns and operational matters, such as reducing the risk of miscalculations, or an accidental escalation or conflict between Chinese airplanes and ships and those from the United States and its allies.

[...]

China has a track record of leaving behind a lot of space junk. LeoLabs says there are nearly 1,000 abandoned rocket bodies in low-Earth orbit, with an average mass of 1.5 metric tons.

"That number continues to grow, posing a significant risk to the space environment," LeoLabs said in a statement. "While Russia and the US have improved their 'rocket body abandonment behavior' over the last 20 years, the relative contribution by other countries has grown by a factor of five and China by 50x.

"The rate that China is leaving abandoned rocket bodies in orbit reverses the improved behavior of US and Russia and results in a continual accumulation of objects that will be especially prolific in creating fragments if involved in a collision," LeoLabs engineers wrote in a paper last year.

LeoLabs researchers found the total mass of all rocket hardware in low-Earth orbit (LEO) is currently nearly 1,500 metric tons. "Sadly, the rate of rocket body mass abandonment in LEO has actually increased in the last 20 years relative to the first (approximately) 45 years of the space age."