When you see those, you can compare them with satellite maps
https://www.heavens-above.com
also you will know easily that satellites or debris doesn't flash at you or change course at dazzling speeds :)
This may sound a bit weird but when you see something that is definately not of earthly origin, send it Love. Think a positive thought and direct it to them. If it's a positive Federation craft (nowadays most unexplained UFOs are them) they will beam the energy back to you, it feels great.