Sensational image Marco congratulations. This object is listed in the revised Hartungs as object 646. I have viewed this years ago using a 37cm and O111 filter. There are notes that there is some positional co-incidence with a "new star" recorded by Chinese observers in AD185. Though another nearby object RCW86 is the likely Supernova remnant for this event.
Some interesting sites below.
http://en.wikipedia.org/wiki/SN_185
http://www.chjaa.org/2006/2006_6_5p635.pdf