NGC 104 Blew A Bubble

Here is my contribution to the March contest, but I did it a little different. I have processed this object before, but never noticed this until this evening. I figured that it must be an artifact on the camera or filter, but then I looked at other images with different equipment and once you notice it you can't help but see it. I'm honestly surprised no one mentions it because it looks really cool to me. I've been telling friends to call it Scotty's Bubble lol