During a clear noon with no clouds and dense blue sky, I looked straight up, 12 o'clock and observed something slowly moving across the sky at apparently extreme altitude.
I stared at it for a good 15 minutes with my school mates.
No structure could be seen, nor any lights.
No color, just an extremely bright solid white dot crossing the sky with a brightness rivaling the Sun, but no glare.
This white dot appeared to be not much smaller than a dime at arms length.
To me it looked just like a white hole in the blue sky, my best description.
Incidentally, there was also a Nike missile base not far from this location.