I, along with two women observed in the early west night sky (6PM), an object that appeared to be an aircraft (10,000ft. Elv.?). At first it appeared to be flying towards us head on (with its bright headlight on). It appeared to be pulling something (a banner) Or a large vapor trail? There was no sound nor flashing red/green or strob lights. Then the aircraft discharged something that grew very bright white and defused light. The bright defused light resembled a bright light shining through a mist/fog. It was a clear night. Associated with this bright light was a blue misty light. After a few minutes (2-3 min.), we could observe the aircraft continuing to travel northward, but, reduced in size/brightness of that of the planet Mars (no flashing red nor green lights). The aircraft was flying from south to north in the night sky. There is a small commercial airport (Galespie Field) in the city of El Cajon. about three miles south of the observed sighti! ng location. I, nor the two woman observers have never seen anything like this before. I wish send three photos of what the object looked like. I will also send a video rap up of the event. I will title it Santee, CA UFO sighting.