A full 22-degree circular halo spotted today, caused by sunlight refracting through ice crystals in the thin cloud layer. (It was around 65F at ground level.)

These halos are about the same width as a 1x photo on my phone (and most point-and-shoot cameras I’ve had), so I used the wide angle mode to catch the whole thing and then crop it down. I bumped up the saturation a little, but otherwise it’s unprocessed.