NGC 6888 Crescent Nebula (https://en.wikipedia.org/wiki/Crescent_Nebula) is in Cygnus and is the bubble thrown off by a red giant and then illuminated and agitated by the remaining Wolf-Rayet star. Wikipedia has the whole story.
Taken with my old (circa 2006) Meade LX90 8" UHTC with a filter draw and Optolong l-Enhance narrowband (Ha,Hb,OIII).
0.6x0.4 degrees field of view.
65x120s, Gain 1600 (Unity), Offset 30, Temp -5c
Mount: NEQ6 Belt modded, new bearings.
Image date, time and location: 2022-07-26, Manche, France
Telescope aperture and focal ratio: Meade LX90 8" UHTC F10 fl1864
Camera and filters used: QHY294PROC, Optolong l-Enhance
Processing applied: Pixinsight, Affinity Photo
(http://gallery.orpington-astronomy.org.uk/albums/userpics/10050/normal_NGC6888_PCC.jpg) (http://gallery.orpington-astronomy.org.uk/albums/userpics/10050/NGC6888_PCC.jpg)
Very nice result Duncan. Not commented before as I have been on holiday. Those optolong filters do a good job.
Carole
Thanks Carole.