I am not an expert but That doesn't look like a missile trail to me..it looks like that Nebula that the enterprise entered in Star Trak 2 when Khan was after Kirk
I saw the same from the desert. As bright and as large as a full moon on the opposite horizon, lingered for 20-30 minutes. Your photo was only after it subsided perhaps 70%. Had a curly-cue tail looking like a multiple loop trail and then a bright nebula like glow in the center.
Good news is that there's been no chemtrails for a couple of weeks. <;^)