UPDATE SEPT. 19: ExoAnalytic Solutions, in response to this story, said: We stand by our previous video and data. We will be releasing an enhanced video and a scientific paper this week at the AMOS [Advanced Maui Optical and Space Surveillance Technologies conference.

PARIS — On June 17, the AMC-9 satellite owned by fleet operator SES suffered a sudden power loss that shut down its ability to obey ground commands or to send telemetry.

SES ground teams succeeded in switching off its telecommunications payload, but the satellite soon began a . . .

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