Tom Pickett first posted an image of Betelgeuse's Ring or 'Pickett's Bell' as he calls it, to FB on Nov 23, 2015.
His comments in part from FB, "Here is an image of the star Betelgeuse and this strange bell shaped dark nebula that circles the star... A few friends of mine and myself did a search to try and find a name for this strange bell shaped object and nowhere is it listed, so I'm calling it "Pickett's Bell" for now until someone can find an official name for it... I hope you like this image.."
I searched previous wide angle images of Orion and checked star atlases and immediately was struck that the ring has been imaged for many years but no one noticed, and that atlases show the ring by absence of stars. Also, Barnard a hundred years ago noticed at least portions of it because some Barnard Dark Nebula are involved.
So I took a look, and sure enough, while portions of it are immediately obvious, and while the fainter portions take effort, time and good skies, it is visible! One never knows of course and there's the issue that digital images more and more diverge from the naive appearance as if we might one day find ourselves floating much closer to the object in space.
That you saw it and provide your perspective is wonderful! It's a most interesting object because of the variable intensity, newness, extreme size and omission by all of us over decades.