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September 4, 2019 07:00 am

SpaceX Satellite Was On 'Collision Course' Until ESA Satellite Was Re-Routed

The European Space Agency (ESA) yesterday took action to avoid a collision with a SpaceX broadband satellite after a bug in SpaceX's on-call paging system prevented the company from getting a crucial update. Ars Technica reports: "For the first time ever, ESA has performed a 'collision avoidance maneuver' to protect one of its satellites from colliding with a 'mega constellation,'" the ESA said on Twitter. The "mega constellation" ESA referred to is SpaceX's Starlink broadband system, which is in the early stages of deployment but could eventually include nearly 12,000 satellites. Action had to be taken because the ESA's Aeolus satellite and a Starlink satellite were on a course that carried more than a 1-in-10,000 chance of a collision. According to the ESA, the Earth-observation satellite Aeolus "fired its thrusters, moving it off a collision course with a SpaceX satellite in their Starlink constellation." "SpaceX explained in a statement today that it didn't initially take action because of early estimates that the risk of collision was much lower than it turned out to be," the report adds. "SpaceX said it would have coordinated with ESA to avoid a collision once the estimates got worse, if only the paging-system bug hadn't prevented SpaceX from getting an update on the collision probability. SpaceX said it is trying to fix the bug to prevent such mishaps in the future."

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