UFO Sighting in Ottawa, Ontario on 2017-06-03 05:00:00 - Very bright stationary light at high altitude

Standing on a backyard deck at 5 a.M. noticed a very bright light at what appeared to be high altitude. (stars / moon not visible). initial reaction, maybe a plane?, but the light was stationary as observed for 30 minutes. cloud cover then obstructed the viewing. geostationary satellite? the use of binoculars did not help with image clarity. have been viewing the sky from this location for 30+ years, and have never before seen anything like this.