White light moving W to E to Big Dipper. Hung there until it disappeared

My location was behind (directly south of) the old sheds and farm house located at the east end of State Line Road in New Pine Creek, CA (on the Oregon/California border).  My sleeping bag and pad were on the ground with my head at the SE and my feet pointed toward the NW.  Far off to my left, at a point near WNW, I saw a “white light” moving in a straight line across the sky (toward ENE.)  Because the “white light” was moving, I decided it must be an airplane.
 At first, because the “white light” was moving at what I call a slower than normal airplane speed, I thought it was a small, private plane -- yet there were no blinking red/green lights.  Due to the lack of blinking lights, I decided it was a much larger airplane and must be flying at approximately 30,000 feet or higher, and I probably would not see blinking lights from that distance.
 I presumed the “plane” had have taken off from Portland or Eugene, OR and was heading for Boise, ID, or Salt Lake City, UT – and might have been ahead of schedule.  Therefore, the pilot was flying at less than normal speed so as not to arrive too early at the terminal.  I continued to watch the light for approximately 35-45 minutes (or longer) as it continued to move in a straight line across the sky.
 When the “white light” reached the middle of the “cup” of the Big Dipper, it stopped moving; it just hung there!  Puzzled, I continued to watch it very carefully expecting to see some movement that would explain why I had thought the “white light” (airplane) was staying in one place.  Yet it did not appear to move.  Again, it just seemed to be hanging there.
 I continued to watch the light for at least another 20-25 minutes as the “white light” remained in the same place.  Then, suddenly I realized, whereas the “white light” was still in the same spot – it was getting smaller and smaller!  I watched the light for many more minutes – until it disappeared.
 In thinking carefully about what I had just observed, for that “white light” to have covered the distance to the area of the Big Dipper – he was really moving!  Then, at the place we call the “cup of the Big Dipper,” where the light made a 90-degree turn to its left and moved away from Earth until it could no longer be seen -- again, to me, that meant he was really moving!  Until, and unless, proved otherwise, I firmly believe the “light” was not an airplane, but must have been a UFO “way, way out there.”