Bisected Halo. A clear 22-degree halo around the sun, bright enough that I didn't have to adjust the image afterward. This is straight from my phone.
Even cooler: you can actually see the contrail's shadow on the layer of cloud that's producing the halo! The sun is behind the tree, and while the contrail pops out so it *looks* closer than the almost uniform layer, but it's clear that the contrail is higher.