I was finishing up an evening at a free campsite south-west of Tucson, happened to look out my window just in time to see 5 or 6 large, stationary dull-orange glowing orbs floating above the mountain-line. I immediately thought UFO, but had too short of a time to observe. I am not sure how long they were there before I saw them. It was only a few seconds before they began to fade in sequence, one after the next, from what seemed furthest to closest, and disappeared completely from sight. Continued watching for them for 15 minutes or so and saw nothing else, but several helicopters were doing passes underneath the sighting zone for awhile afterwards.I was very excited, but disappointed the sighting was so brief.