UFO Sighting in Katy, Texas on 2017-08-11 23:00:00 - Whiteish blue disk emitting bright aura that lit up sky

Me and my girl friend were in the back yard looking at the stars (i'm an avid astronomer) and satellites. we then noticed unusual flashes occurring in the north western part of the sky. then out of no where a large circle like object shot across the sky it also emitted an extremely bright aura that lit up most of the sky. we continued to see flashes further into the night with no explanation as to what it could be. we checked weather in the area and the skies were clear. we did also saw several shooting star although not out of the ordinary for us but we will stay vigilant and keep watch.