Not an airplane contrail, not a rocket launch, nor a normal cloud! It's left by a super meteor (a fireball), ionized gas in our atmosphere still glowing hot after the meteoroid object entered the atmosphere. The image shows the dragon-like "persistent meteor train" less than a minute after the meteor. See this view in a unique timelapse video. Read more about this on Phil Plait Bad Astronomy page. The scene is captured in October 2012 during the Orionid meteor shower, from a lake in northern Maine, USA.