You need to determine velocity and distance in order to determine if the thing you just saw blink out a star is in orbit around the Earth (or not). There's a lo

You need to determine velocity and distance in order to determine if the thing you just saw blink out a star is in orbit around the Earth (or not). There's a lot of distance between the Earth and the star, and literally anything between your eye and the star could obscure it from your perspective. We aren't even close to detecting/tracking all of the objects in the solar system that could do that. I'm also assuming the thing is not reflective (per the comments earlier I was originally replying to). > An adversary can (presumably) almost immediately target that location if they are willing to admit they saw it You'd be late to the party. If it was in orbit around the Earth, and since you don't know its direction or distance from Earth, your impact object would have to do a lot of searching once it got into space. If you had a giant laser to destroy it and could fire instantly upon detection, it will have likely moved quite a bit in the fractions of a second that it took the light to reach it. And, again you don't know the direction it is moving.., you can't compensate.