The Cosmic Question Mark Nebula Complex

This is the complex of nebulosity that has become known as the Cosmic Question Mark, a good name as its official designations are confusing. The top arc is usually labelled as NGC 7822, and the middle region as Cederblad (Ced) 214. However, some charts and references label Ced214 as NGC 7822, as it is brighter and might have been the object William Herschel saw when amassing observations in the 18th century for his General Catalogue, in which he describes NGC 7822 as "eeF! and eeL!," meaning really really faint and large! The little "dot" of the question mark is the faint and photographic-only nebula Sharpless 2-170, surrounding a little cluster Stock 18 . The field is embedded in dust, indicated by the brownish-yellow tint of the background sky at centre, contrasting with the dust-free bluish starfields at top and bottom. Even the star clusters are yellowed, notably King 11 at top right and NGC 7762 embedded in the nebula at right above the bright star. The loose and sparse cluster Berkeley 59 lies embedded in Ced 214.. Most of the field lies in Cepheus but the lower bits of Ced214 and Sharpless 2-170 lie across the border in Cassiopeia. This is a blend of filtered and unfiltered stacks: 10 x 8-minutes at ISO 3200 through the IDAS NB1 dual narrowband filter, and 10 x 4-minutes at ISO 1600 with no filter, all through the SharpStar 61 EDPHII apo refractor at f/4.6 with its reducer/flattener, and with the red-sensitive Canon Ra, all on the Star Adventurer GTi mount/tracker, autoguided with the Lacerta MGENIII autoguider, taken as part of testing the mount. No darks or LENR applied here, but the autoguider applied some dithering offset between each frame, to largely cancel out thermal noise hot pixels when the sub-frames were aligned and stacked. Taken Sept. 21/22, 2022 from home in Alberta on a very clear cool night. Shooting and then blending filtered with unfiltered shots provides the best of both worlds: lots of reddish nebulosity set in a sky with natural coloured stars and background tints. I applied a slight level of star reduction with a "starless" layer created with RCAstro Star XTerminator, but with only 25% opacity to just reduce but not eliminate stars. In fact, StarX did a poor job eliminating all the stars in this image. But Noise XTerminator did a great on reducing fine-scale noise. Nebulosity was brought out with DM1, DM2 and colour-range luminosity masks created with Lumenzia plug-in panel for Photoshop. Finishing touches with a High Pass Sharpen layer and a Paint Contrast layer (the latter added with TK Actions panel) boosted fine-scale contrast to the nebulosity. All stacking, aligning and blending done in Adobe Photoshop. A footnote: This has traditionally been a target that has always given me trouble with technical issues or some other problem often spoiling the images. As it was, some guiding errors from the mount mistracking marred a number of frames, but a selection were good enough to use for this stacking set. The result was my best take on this target.