Ufo sighting ?

Hi guys last night I saw something unexplainable. It happened at around 4am right above Cologne cathedral in Cologne, Germany. I was looking at the church and above a fast reddish looking dot flew past at high altitude but not a straight line it rather moved like an insect, I only saw it for about 2 seconds though. Have there been any sightings like this or in the area? Thanks for the help!