Bright stationary white lights in the sky that slowly faded away

I looked out my kitchen window to the south at about 3:30AM on Friday morning June 18 2021 and saw two star like white lights in the sky that were about the same brightness as Vega. The lights were about 5 degrees apart in a east-west orientation in the close proximity to the star Altair and were not moving and looked exactly alike. After watching them for a few seconds the light to the east slowly dimmed out followed by the light to the west dimming out in the same manner. I ran outside to see if the lights would return or if I could find some more. After looking around the sky for a while, which was very clear at the time, I didn't see anything else unusual. I'm a amateur astronomer and I've seen plenty of satellites brighten and fade away, but these objects did not move! Never seen anything like it. They could have been there more than 15 seconds as the lights were already there when I looked out the window.   This was not Starlink!