Like Robin, I was encouraged to go after this supernova remnant thanks to Uwe posting his drawing. I observed it twice this winter and both times I looked for it in my 16-inch using 105x and an O-III filter. And each time, I came away with the impression that there was a phantom-like line that would come and go as my eye passed over it. It also seemed to get brighter towards the west -- right at a little Aries-shaped star pattern of three faint stars. The first night I saw that, I thought I was just seeing the glow of the three stars. But by closely studying the attached image, I could see that the O III emissions just happen to get more intense right there. It was a tough observation for me, but after having the same thing happen to me twice, I'm confident I saw it. I'd catch a surprisingly strong glow right at that triangle that would slowly fade to the east.

Scott H.

Mono SNR marked.jpg
Image Credit: Daniel Pölzl