Football Shpaed craft seen over Detroit suburb (1966)

I was ten years old and had walked out on to our front porch.  (My parents had some Canadian relatives over and they were playing cards inside at our kitchen table.) 
Upon getting out the front door I noticed four neighbors out on their front lawn two house north of mine.  They were talking about something and had a telescope outside with them on a tripod.  I remember thinking that that was pretty cool.  
I looked at them and then looked in the direction that their telescope was pointed just in time to see a glowing, bright powder blue football shaped object come towards us.  It traveled in a straight line trajectory very low (maybe a few hundred feet up) and passed right over us without a sound.  
It was a clear cloudness summer night and this was no searchlight beam or airplane.  I had never seen anything like then or since!  I immediately ran inside to get my parents but it never returned. 
I don't know why the people two houses down had a telescpoe out but ! suspected that it may have been around before I saw it.  I'll never forget it.
Witness indicates that the date of the sighting is approximate.  PD