A strange Russian “inspector” spacecraft appears to be stalking a confidential US military satellite, experts have pointed out.

The Russian satellite Kosmos-2558, launched in August last year, has frequently come close to the American military satellite USA-326, which the Pentagon said is meant to gather intelligence via “overhead reconnaissance”.

 Space observers have flagged Kosmos-2558 as an “inspector” satellite capable of moving close to other satellites and gathering data.
 Orbiting Earth in the same plane but at different speeds, the Russian satellite has been able to pass beneath USA-326.

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