Sh2-115
"It is a H II region of considerable extension with an oval shape and crossed in a northwest-southeast direction by a dark band that apparently divides it into two equal parts: the eastern part is dominated by the presence of a small open cluster , known as Berkeley 90 , with which it is physically associated, while the western part lies in the direction of the variable star α 2 CVn HD 196178 (V2015 Cyg), of average apparent magnitude equal to 5.63; ...  The stars responsible for the ionization of gases are LS III +46 12, of spectral class O6III, DM46 2972, of class O9.5V, and DM46 2978, of class B0III; the first of these dominates the Berkeley 90 cluster..."
Sh2-115 corresponds to the ionized part of a large molecular cloud whose mass has been estimated to be approximately 4400  M , extending over 30 parsecs. According to the Avedisova catalog , the star- forming region to which this nebula belongs also includes several sources of infrared radiation observable in its directio... to these is added the source of radio waves W71. Its distance of 2300 parsecs corresponds to a region of the Orion Arm located just beyond the great nebulous system of Cygnus X , from which it would be about 500 parsecs away. https://it.wikipedia.org/wiki/Sh2-115

Abel 71/Pk 85+04.1
is a small emission nebula visible in the constellation Cygnus .
It is located in the northern part of the constellation, about 3 ° northwest of the bright star Deneb and on the northern edge of the much larger Sh2-115 nebula ; the most suitable period for its observation in the evening sky falls between the months of July and December and is considerably facilitated for observers located in the regions of the terrestrial northern hemisphere .
This nebula has a circular shape, to the point that in the Sharpless catalog it is indicated as a possible planetary nebula ; in fact this was also believed subsequently, to the point that it reports various designations of catalogs of planetary nebulae. However, a 1991 study made it clear that it is actually an H II region : observing it through an Hα filter , it presents the typical characteristics of other small H II regions, such as NGC 2359 , while almost no emissions are detected through the OIII filter . . Despite this study, its distance still remains unknown.https://it.wikipedia.org/wiki/Sh2-116

A Comparative Study of Morphology and Velocity Field of the Emission Nebulae S153, S207, S211, and A71
Pismis, P. ; Hasse, I. ; Quintero, A.
Abstract
Data on five small, roundish (dimension 2-5 arcmin) H II regions are presented: S153, S207, S211, S212, and A71. The data consist of images through narrow-band interference filters and Fabry-Perot interferograms yielding velocities over the face of the objects. Similarities in the morphological details of these objects are examined, particularly those in their ringlike outer filaments. The velocity field of the first four nebulae is consistent with an overall expansion (3-4 km/s). A71, with a striking resemblance to S207, is not a planetary but an H II region. https://ui.adsabs.harvard.edu/abs/1991PASP..103..843P/abstract
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Because it finally seems that we have processed 98% of the 2020 projects, we decided to carry out a more recent one and this one in particular we wanted to do it.

Maurizio took the shots of these sessions during the months of Oct to Dec 2021 both in our backyard and in two mountain areas and, seeing the results, they played an important role in the quality obtained from these sessions. The last two sessions carried out is one of the first times that we used the Triad Ultra filter.

An AHD stack was performed in DSS and seeing the result in a quick workflow, I was impressed by the amount of information provided by the Ha.

Next, the extraction of Ha and [OIII] in Siril was done. Seeing the pure extraction of the Ha, I was shocked, as was the [OIII]. The green synthetic channel was made with Ha .3 and [OIII] .7.

For the RGB composition I used the Thomas Edward Christian, Jr. workflow Thomas Edward Christian, Jr.  To this result worked as Hubble palette colorization I added my own workflow with the DSS AHD stack, then I did other combination as HOO  leaving 100 of [OIII] in green and blue channels and add thisin a blending in progress.

The results of the Siril extraction for some reason turned out to be very dense and I had to unusually apply up to four arcsinh curves to them. Ha extraction was used also as luminance after applying Asinh Transformation manually in Siril.

As Maurizio didnt took a L-Pro session for have the stars base as usually he does, I worked the stars with the AHD DSS stack. To obtain the stars I had to do a test in both StarNet++ and Star eXterminator, both did their function but fortunately StarNet left the halos of the big stars completely in the starless image, in this way when you do the substration with the 'stars image' in Image -Apply Image or in the blending mode, the 'stars only' frame result is 'clean' without a halo around it, all the stars that have this situation I recommend this method, seems effective and I found by causality in the last two projects.

We had some doubts whether to crop the frame to center Sh2 115 and Abel 71 in other way, but in the end we liked the successful expression of Ha's 'mountain' so much that we decided to leave it as is.

We appreciate the visit you give us and I hope you enjoy it.

Processed July 2022

https://twitter.com/AstroOtus/status/1545096198415155200