September 20, 2015 ~9:00PMWSW at about 20 degrees over the horizon, just below Arcturus, I noticed an orange/white light. It was brighter than Arcturus. Over the span of a few minutes, it appeared to gain a bit of altitude and travel slight south. The light exhibited a few slow strobing, shifting slight back and forth between orange and white without fully becoming either, as opposed to the twinkle of stars.I ran for the binoculars, hoping to see some definition. The binoculars were out of adjustment. In the minute it took to properly adjust them, the light had disappeared. I did not witness the disappearance, but had a clear enough view that I am fairly confident an aircraft would not have exited my field of view that quickly.