The object was triangular in shape,and very big,the sky was 80% cloudless,the object had a red to orange power source glowing at its base.It was at a very high altitude,or outside the atmosphere,because it followed and arc in the sky.I would estimate its size at 1000m in length and width.

The object appeared to the NE and travelled at high speed toward the SW,it did not change cours,I was on top of a 13 story building looking out too see from a penthouse with a clear field of view of 200 degrees.i am an experienced sea captain and celestial navigator,and had drunk no alcohol or taken any drugs, and i have perfect eye sight.This object was moving at an incredible speed.Had a black apearance and a orange to red power source or light.This was not an aircraft or satellite!And not the ISS!

I would not normally report such an event,due to the stigma attached.But i am 100% sure of what i saw,this was an enormous object moving at an incredible speed,black and pyramid or triangular shaped.