Cosmo Sh2-91
Sh2-91 constitutes the most extended southern filament of the supernova remnant G65.2+5.7, located about 2610 light years from the Solar System in a Galactic region rich in dense molecular clouds, on which lies the Great Rift. G65.2+5.7 is in fact a super bubble extended over about 587 light years and located about 261 light years north of the Galactic plane. Sh2-91 shows a strong polarization, indicating the presence of a strong magnetic field.
The entire SNR is oval in shape, and about the same size as the much better-known Veil Nebula, which is also found in the Cygnus. However, G 65.3 + 5.7 is considerably fainter than the Veil Nebula. Probably for this reason, not that many images of this region are seen……but is now perhaps becoming a more popular challenge for Narrow Band imagers with CMOS cameras.
