Intermittent pulsing blue light at high altitude with random movementIncident Date: 10/15/2012 11:02 PDT High altitude, blue/green light appeared in the visual vicinity of Jupiter. Object appeared to Pulse at random intervals and with random lengths of duration.Object was first thought to be stationary, but after approximately 2 minutes of observation, it changed position in the sky. The object continued to appear around the area of Jupiter in the sky. Moving in a random, yet semi-circular pattern, it remained in a relatively small area of view until approximately 11:15 PM. At this time the object appeared to move in a South Westerly direction, but at varying rates of speed and with multiple apparent sudden "darting" movements and course deviations.The object then appeared once again to stay in a relatively small area of the sky, but continued exhibiting sudden bursts of movements in random directions and often at near to absolute right angles.I continued to watch this object for approximately 55 minutes before it eventually seemed to either cease to emit light, or moved out of visual range.Throughout the entirety of this event, the pulse demonstrated no apparent pattern or rhythmic behavior as would a typical aircraft anti-collision light array. It was also not accompanied by the typical white and red lights of traditional aircraft.Based on my personal experiences as a pilot and lifelong aircraft enthusiast, with a profound understanding of aerodynamics and atmospheric phenomenon, I would estimate the object to be upper atmospheric or low space in altitude. There was no accompanying noise to indicate any type of typical aircraft propulsion and the ability to both “hover” and perform abrupt, high speed changes in direction as well as sudden bursts of acceleration run contrary to what is understood to be within the aerodynamic capabilities of winged or rotor aircraft. I.e. the altitude alone would prohibit sufficient lifting across a typical wing surface without the object having to move at a constant and extremely high rate of speed.The object also demonstrated none of the typical behaviors of satellites or other near earth orbiting objects, either Geo-stationary or Geo-synchronous.