Japan Airlines Flight 1628 Encounter

Record summary

The crew of Japan Airlines Flight 1628 reported two smaller lights and a much larger object during a cargo flight over Alaska. Air-traffic controllers recorded communications and radar-related information, and the Federal Aviation Administration investigated the episode. It is useful for comparing cockpit estimates, controller testimony, radar processing and subsequent official statements. The object’s apparent size and radar correlation were disputed, with possible explanations involving planets, aircraft or anomalous returns. The documentary record is stronger than many cases but does not identify the object conclusively.