I saw a bright round object travelling quickly over my head

I was walking my dog and it was at dusk just before last light of day...I couldn't help but notice a rather large object the size of a streetlamp bulb and the same color as the moon tonight ...no sound, no lights on it, moving quicker than an airplane and travelling in an arc curvature...I heard myself say "what was THAT?" in astonishment and strained to see if I could still see it, but it was gone... I figured it was a meteor or space debris of some sort but it moved more like an aircraft would, in my opinion, because of the arc it made. I had no time to take a photo or video.