Pulsating / morphing/ light changing object

Object moved at constant medium speed. First a bright orange light was spotted which dimmed and eventually went out. The object was still visible and moved progressively overhead. The object appeared to be within its own forcefield, pulsating and changing shape. It also appeared to be made up of multiple elements which came together on multiple instances to form a disc shape. The object appeared clouded / cloaked although it was a crystal clear evening. The object was as high up as a low flying plane. It was definitely not a drone / plane or like any object we'd ever seen before. It made no sound and left no trail.