Glowing Metallic Object

A METALLIC ELLIPTICAL SHINING DISK WAS MOVING SLOWLY NORTH OVER THE ATLANTIC.IT WAS HUGE,500 FEET LONG. IT WAS HIGHER IN THE CENTER THAN AT THE EDGES.NO LIGHTS, NO WINDOWS, NO MOVING PARTS.I COULD CLEARLY SEE WHERE THE SUNLIGHT WAS HITTING IT. IT JUST STOPPED IN MIDAIR AS WE WATCHED,IT REMAINED IN THE SKY AGAINST THE HORIZON FOR 4 MINUTES. MY MOM TOOK 2 POLAROID SHOTS. IT SHOT OFF STILL HEADING NORTH AT A SPEED I CANT ESTIMATE, IF ONE BLINKED ONE WOULD HAVE MISSED IT LEAVING.    https://nuforc.org/sighting/?id=67535