I saw a fast-moving item overhead Frankfurt, DE (slightly to the east of Frankfurt) at approx. 20:35 UTC on July 27th, 2018 with a track of something between 010° and 040°.
There were no blinking lights and I didn't see any aircraft on flightradar24 in that timeframe. Also, the ISS orbit is more east-west above Frankfurt, isn't it? It was also faster moving than I remember the ISS moving when I watched it once a few years ago. The color of the light was white-yellow-ish with constant brightness, the same light as stars. It basically looked like a fast moving star.
Any ideas, what it could have been?
Also, more general, what is a good approach to look something like that up?