From the linked-to Vice article at https://www.vice.com/en/article/dyp9ez/secret-government-info-confirms-first-known-interstellar-object-on-earth-scientists-sa

From the linked-to Vice article at https://www.vice.com/en/article/dyp9ez/secret-government-info-confirms-first-known-interstellar-object-on-earth-scientists-say https://www.vice.com/en/article/dyp9ez/secret-government-inf... > Some of the sensors that detect fireballs are operated by the U.S. Department of Defense, which uses the same technologies to monitor the skies for nuclear detonations. As a result, Siraj and Loeb couldn’t directly confirm the margin of error on the fireball’s velocity.