Airplane Leaves Amazing Rainbow Contrails Overhead, , Viral Hog

Occurred on June 13, 2019, Brisbane, Queensland, Australia Qatar Airways Boeing 7772DZ(LR) Reg. A7BBG as flight QR921 displayed some truly amazing and very beautiful rainbow contrails as she transits over Brisbane. This has to be one of the most spectacular rainbow contrails I have yet seen with a B777. The seeing conditions were just about perfect on the day, being in Winter with slightly cooler conditions and little air disturbance looking directly upwards to 9. 3 km. The aircraft was en route from Au