A SpaceX executive says a satellite deployed from a Chinese rocket risked colliding with a Starlink satellite.

On Friday, company VP for Starlink engineering, Michael Nicolls, tweeted about the incident and blamed a lack of coordination from the Chinese launch provider CAS Space.

“When satellite operators do not share ephemeris for their satellites, dangerously close approaches can occur in space,” he wrote, referring to the publication of predicted orbital positions for such satellites.

CAS Space reported successfully launching nine satellites on Wednesday using its Kinetica-1/Lijian-1 rocket. The payload included six Chinese satellites, two other jointly-developed satellites for clients from the United Arab Emirates and Egypt, along with a student-built satellite from Nepal.

But it looks like one of the satellites veered relatively close to a Starlink sat that’s been in service for over two years. “As far as we know, no coordination or deconfliction with existing satellites operating in space was performed, resulting in a 200 meter (656 feet) close approach between one of the deployed satellites and STARLINK-6079 (56120) at 560 km altitude,” Nicolls wrote.

“Most of the risk of operating in space comes from the lack of coordination between satellite operators —this needs to change,” he added.

Astronomer and satellite tracking expert Jonathan McDowell says the close approach occurred at around 1:42 am EST Friday, December 12th over the eastern Pacific Ocean, citing US Space Force's tracking data.

"A quick analysis of Space Force public tracking data suggests this was object 67001," he told PCMag. "We don't know which of the Lijian-1 payloads is 67001."

now, CAS Space told PCMag it’s in contact with Nicolls to learn more about the “alleged incident.” However, the company noted: “We value the responsible use and sharing of space as the utmost priority. Situations like these are the reason why nations should work together in space, build their common understanding instead of segregating emerging nations.”

But it doesn’t appear CAS has many details about what exactly occurred. The company said: "As a launch service provider, our responsibility ends once the satellites are deployed, meaning we do not have control over the satellites' maneuvers. Nonetheless, it is everyone's common interest to avoid collision, so CAS Space will provide help however we can."

The company added: “Our first priority is to identify the exact timeline of the incident. Which of the nine satellites were involved? Did the incident happen during satellite deployment or during the orbit maneuver of one of the satellites? Once we have a clearer picture, we will be in a better position to provide assistance to Starlink.” the Chinese launch provider said.

In addition, the company asserted that “All CAS Space launches undergo a mandatory process to align our deployment sequence with ground-based space awareness systems to avoid any potential collision with known satellites/debris. Kinetica-1 Y11 launched at 04:03:45 UTC exactly to an SSO at 550 km with LTDN at 10:30. Satellite separation was nominal. No collision risks were reported for the deployment process.”

In a tweet, McDowell said CAS Space's response "seems reasonable." "Two days after launch is beyond the window usually used for predicting launch related risks," he told us in an email.

Still, the incident highlights an apparent gap in the positioning information supplied by Chinese satellite operators. McDowell noted that SpaceX normally uses US Space Force tracking data to help it steer clear of any collision with other satellites. "But perhaps the TLE (satellite positioning) data were not available soon enough for this to happen. This emphasizes how much operators can be impacted by the long delays in providing TLE data for newly launched missions," he added.

a result, McDowell wrote in a tweet: "What we really need is an international space surveillance and coordination system in which both the US and China participate, and that ingests operator ephemerides immediately after launch in addition to passive tracking."

It’s not the first time Chinese space activities have raised alarm bells in the US over potential collision risks. Last year, a different rocket carrying satellites for a Chinese version of Starlink broke apart in space, creating at least 300 pieces of orbiting debris.

Nicolls wrote the post when Starlink currently spans over 9,300 satellites in Earth’s orbit, according to McDowell. SpaceX’s satellite constellation has become so large it encompasses about two-thirds of all satellites in low-Earth orbit.

To prevent potential collisions, SpaceX publishes its own satellite positioning data while employing “Starlink collision avoidance operators, which are available on a 24/7 schedule. The company’s Starlink satellites also feature propulsion, enabling them to maneuver in space, including dodging debris from a Russian anti-satellite missile test back in 2022.

Nevertheless, the growing number of satellites has fueled worries about the “Kessler syndrome,” or where a single satellite collision could trigger a self-perpetuating chain reaction of impacts when certain orbits are becoming increasingly crowded.

By: DocMemory
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