Daylight sighting of metallic sphere over golf course in Calgary, Alberta in Summer of late 1960's.

This event occurred on a clear blue summer day over the Canyon Meadows Golf Club in SW Calgary, Alberta.  It would be the summer of 1966,67 or 68.  Since a number of highly credible sightings, which included photos during the summer of 1967, I am using the 1967 date but I can't actually remember the date other than I am positive it was summertime.
Object was spherical, metallic-grey (gray), scratched or scuffed surface, perfectly stationary and seemed very close (<500 ft). Vague memory of "heat waves" eminating around it but couldn't be mirage as it was well above the ground.  More like an optical distortion.  Appeared spherical due to sun shaping it as it would a ball. Hovered over golf course and was brought to our golfing party's attention by other golfers so there were more than 3 percipients.  Sky was very clear blue and the weather was sunny and warm and object was almost due West.  Gave up trying to make sense of it and teed off. Looked back halfway down the fairway and it was still there but slightly more SW direction which is another reason I feel it was very close.
Witness indicates that date is approximate.  PD