Circular white light rising fast from the desert straight up into the sky out of sight.

Looking out the back window of the house a white circular object rose into view. 1st-second, I thought someone released a balloon that was reflecting the late day sun. That thought was immediately dismissed, it was not drifting or wavering in the air. 2nd-second, I thought it must be a drone. That was also immediately dismissed, it was rising straight up very fast and I thought; “can a drone rise that fast”? I said to my wife; “what is that”? I got up and quickly went to the back window…it was already getting to the height of my 10ft tall patio awning. I had to bend over to keep it in view as it rose so fast. At that point I thought; “what the heck, this is fast” and it was above the awning out of sight. I felt it sped up as it rose. I immediately opened the sliding door and went out and scanned the skies. It was gone. Being aware of drone battery life, I stood for a long time scanning the area to be sure nothing was returning to the town area. Nothing came into view.
Here is some reference information. I am very familiar with aircraft in the sky, have built WWII model airplanes growing up, built and fired model rockets (kits and home-made designs) growing up, worked for Northrop Grumman, sky watch and own a telescope spotting scope and binoculars. I grew up in Torrance California and saw many Vandenberg Missiles diffuse in the evening sky growing up. I dismiss everything I normally see.
This “item” was baffling. The speed in rising didn’t look normal for anything citizen owned. It went very straight…straight up. The “item” looked round but like a dime turned maybe to a 45 degree angle although the size was smaller. It was not solid white (like a blinding bulb) but more like setting sun reflecting on something but not yellow or orange…so maybe it’s own light. It did not leave a trail (smoke). The base of the Virgin Mountains is about 10 miles away to the south (in the background) but I couldn’t pick up on any depth/distance for the “items” size, sorry. I do believe, looking at the area now, it came from the desert out toward the base of the mountains or Virgin River basin area. As far as altitude, southbound airliners over those mountains (again dismissed) must be at 25-30k feet (guessing). The partial moon visible above my awning was higher in the sky than that. The “item went out of view above all of that before I could get past the awning. It was all over in 10 seconds and is the first thing that’s left me baffled over the years.