At 2050GMT tonight the pilot of Jetmagic523F enroute Paris to Cork
reported an object passed by flashing green blue and white.
Location northern France.
ATC reported nothing on their scope and no known military traffic
nearby. Pilot was asked if it was a meteor. Negative was the reply.
Pilot didn't know what it was.
It didn't show up on TCAS, it should have if it was another aircraft
with a transponder fitted and working.
Other pilots confirmed they saw it too.
ATC finally said they didn't know what it could have been, and a
report on the occurrence would be filed.