Sphere moving very slowly NE to NW.An extremely clear afternoon. I was outside of my house enjoying the sun. I always check the sky when I'm outside for whatever. This object was a sphere which moved very slowly from NE to NW. It's movement reminded me of a satellite but slower. And I have never seen a satellite during the day.I went inside to get my camera with zoom lense altho i had no film, it is my only means of magnification. In the zoom I confirmed shape.I watched for a minute more then saw a small flash and lost sight of the object.I am a photographer. I take alot of pictures of the sky, day and night.The speed and size of this object are the most puzzling to me.I have seen a handful of unexplained objects in the day and night sky during my lifetime.