Satellite type of light moving horizontally west to east disappearing

My aunt (age 68) and I (age 30) were sitting in the backyard when we witnessed in the southern part of the sky a single orb of light, which looked like the ISS, moving west to east horizontally and low across the night sky. The light was about the same size, color and brightness of the ISS, which we both assumed it was at the time. It did not blink in any way or emit any noise. The light seemed far away, and it did not streak like a meteor.
The sky was clear with no cloud cover. The light was quite quick at first, moving about the same speed as the ISS, but the light slowed to a halt and then disappeared in the middle of the sky. The light did not move beyond the horizon as you would see with the ISS, it was not obscured by the mountain facing direcrly east of us (Canfield Mountain), nor was it blocked by any tree cover. It rapidly grew fainter in the south east part of the sky until it was no longer discernible to either of us.