Final approach --- landing on the moon, used no computers ---- completely pilot controlled.
They had a mechanical simulator --- with modified earth gravity (Flying Bedstead) for practice.
They got about 30 practice runs (Armstrong crashed one).
Then ---- then do a perfect landing the first time on the moon --- with different gravity.
OK ---- so simulate this, give only 30 practice tries, change the gravity settings and do it perfect.
It was high. The sun had set (yet still in the sunlight).
Going way too fast for your suggestions.
How can you guess the speed if you don't even know the altitude of the object? These are all observations from your perspective. There are all sorts of planes that go multiple times the speed of sound even in those days. And even a commercial airliner crosses the sky we can observe rather quickly. Basically you are saying, I saw a fast moving dot in the sky at night, no idea was speed/size/altitude it had, but it was DEFINITELY a satellite in orbit. That's not a very scientific observation.
Yes there were --- and you could fucking hear the sonic boom.
You could also estimate the speed by the angle the plane was when you heard it.
Mach Angle
I think you need to re-read my statement. I'm aware they existed back then.
If that's what you saw in the night sky, you would not have heard the sonic boom due to the altitude and thin atmosphere at that height.
https://aviation.stackexchange.com/questions/17661/can-a-sonic-boom-produced-at-60-000-be-heard-on-the-ground