i went to my backyard because we lost electricity for about 30 mins, and this city is very hot in summer so you cant stay in the room without electricity, i was sitting in the backyard looking the stars but i noticed something was moving in the sky, so after blinking several times i could see the V shape of the object, it was flying south direction in a constant slow speed, with no sound, for about 15 secs until the back neighbor wall obstructed my vision. I was "in shock" trying to figure out what the object was and did not react to go to the roof to keep seeing it.something curious, besides the no sound, it was the surface of the object, regardless it was solid black, i could see the stars it was blocking but blurred like the effect you get with the glass.i draw the sight with my poor tools, but that is basically what i saw