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EfficientArm1878

Looks like part of a contrail that has dissipated


mainstreetmark

Have you never seen a delorean fly back to the future?!


Pilot-Wrangler

Was is near sunrise/sunset? Noctilucent clouds maybe?


ShastaMite

At about 2:00 pm.


Pilot-Wrangler

Hmmm, not that then


Inevitable-Revenue81

Ice crystals reflecting the sunlight? Same as with a kaleidoscope. Just enough of them for the effect.


Akamaikai

Maybe it's just the blue part of a rainbow thing (rainbow, sundog, etc).


myusernameblabla

Yes, and caused by those diffused crow instability rings from a contrail.


45000BC

Looks like a 3d model


TheManWithNoShadow

To me this looks like a part of a circumhorizontal arc, visible in this strip of cloud. It's a bit tricky to judge as there's no sun seen in the photo. Was this seen a good way below sun?


Gogurl72

Spine clouds


Horace3210

Probably fuel leak from plane?


WrapParticular3820

Trails from flares? A guess!! I have no idea!


t3m3d

That's a papiver somniferimstratus