Pulsing white light travels left to right, disappears

Very early yesterday morning, I was in my back yard, at approximately 0110 Hrs. doing some stargazing.
I was looking generally to the north, with large trees to the extreme left and right of my field of view, and a two-story neighbor's house in the center.  I had observed several high flying passenger aircraft (typical light/strobe pattern), satellites and a meteor or two.
Suddenly, from behind the left hand bunch of trees, travelling from left to right, at a viewed angle to just clear the top edge of the neighbor's roof, appeared a VERY bright white (PULSING, not flashing) light.  The pulse pattern was: (gradual increase, hold a second or so, gradual decrease)(3 second pause)(repeat)  The time from minimum to maximum brightness was about 2-3 seconds.  Pulsing was not quite regular, but not random either.  The color of the light was absolutely one the purist whites I have experienced.
I would estimate the distance to be middle distance, as it wasn't at airliner flight level, appearing much lower in altitude and close.
I thought maybe it MIGHT be a helicopter, but there was ZERO noise. We have an Army National Guard base nearby, and UH60s overfly regularly, as well as the local Lifeflight.  They make a racket all the time, and I am quite familiar with helicopter noise.  During this event, however, there was NO SOUND/DEAD QUIET.  In addition, there were ZERO other strobes, anti-collision or flashing lights observable.  The light was about the size of a nickel held at arm's length, gliding along at a slightly sedate pace.  The path was a straight line path from left to right, until is disappeared behind the right hand set of trees.  It FAILED to appear where I estimated it should based on course and speed.  I quickly moved in my yard to see if I could re-locate it, but no luck.
Now, during the last few seconds before it disappeared behind the trees, I was able to observe the object with my binoculars.  What appeared in my view was a neon blue...Aura? Haze?, and within this haze was a tumbling, jet-black multi-faceted rectangular-ish shape.   Confused by the blue light, I pulled my binocs away, and that is when the object disappeared behind the trees.
I can honestly say this is one of the most unusual & unnerving things I have ever seen.