2019-07-17 - Spokane Valley, WA - Light

I saw a small bright white light at high altitude a bit to the Southeast moving slowly from Southeast to Northwest.

I walked outside to take the recycling to our bin and was looking at the moon in the South before catching the light peripherally to my left. At first, I thought it to be the planet that has been in the night sky near the Moon as of late, but then realized it was in a different position than that. I then thought maybe it was a plane as a good number of them fly over this area, but it seemed to be moving slower and there was no low rumble accompanying it. I then concluded it must be a satellite. That made perfect sense until the light slowly began to reduce in size and fade. I took a few steps to my left to see around a tree branch, but it evanesced just after I caught sight of it again. Perhaps it was just a meteor in the atmosphere? Or ball lightning at a high altitude? Seemed a bit lax in speed for those as well though.