Bright orange object that turned pitch black moving at a constant speed in a Northern direction (South Africa)On the night we were outside having a BBQ when I saw an object in the sky just beneath the clouds that appeared to be emitting an orange light (bright, but not blinding). It seemed to move in a northly direction at a constant speed.In a moment it I thought it was gone, but it was my friend that noticed that it was still there moving at the same speed, but it had turned pitch black in the blink of an eye. We only saw it because the moon was almost full and you could follow the dark object under the moonlit clouds.This could not be a plane as it didn't have any other identity lights that flashed. It was pure orange, then pure black.I am a refractory supervisor in a BHPB aluminium plant and my friend and his wife work at the local Bank.