Apx. 330am i woke up. looked outside my bedroom window it was dark across the horizon flying very low altitude i saw a object that was glowing infra red whiz by it was a transparent infra red smaller than a helicopter no sound. in recent weeks i had heard air craft in the middle of the night due to wild fires here in flagstaff but the fires are out and this made no sound very very low altitude. i thought if it were a helicopter it would have some blinking white lights but it did not thought it was odd so i decided to report it i can submit photos of the mountain view if that would help i was not able to get a photo at the time