This is NGC 6503, an active spiral galaxy of Hubble type Sc in constellation Draco. It's distance is about 19 million lightyears from earth, but distance information varies greatly between 14 to 21 MLy, depending on the source [1]. As with distance, so does the diameter vary but in average it's about 37 kLy. What's interesting about this galaxy is it's neighborhoodor the absence of the very same. It's actually located within the Local Void, a region of space adjacent to the local group with a surprisingly low galaxy density. Hence, NGC 6503 is essentially a lone wanderer, with only a very small companion galaxy of about 3 million solar masses (KK 242 aka. PGC 4689184, out of image field), which led astronomer Stephen James O’Meara to call it the "Lost-In-Space galaxy" [2].

Hubble Space Telescope (HST) imagery reveals star forming regions (Hydrogen) and areas of new stars (bluish). Since I tried to be conservative with color saturation, the overview image only hints those regions. For clarity, I have added a detail revision, showing those regions with more saturation. For comparison of those regions, see the HST image [2].

Now to the generation of this image. As a broad band object, it's not easy to capture during summer from my location. Astronomical darkness is absent from early June for about a month and for the days when the data was collected, the period from astronomical dusk to dawn is at most three hours. Despite that, I started imaging shortly after nautical dusk and continued until close to nautical dawn with the goal of capturing as much data as possible and throwing out those subs which didn't meet the standards. The limiting factor w.r.t to sky brightness is actually the off-axis guiding setup which requires pretty dark skies to reveal guide stars with sufficient SNR. Although summer, we don't have steady clear skies and so an efficient data collection is required which the imaging statistics for this image show.

With all those circumstances, I have collected about 8 hours worth of usable data, with a LRGB ratio of 2.2:1:1:1. Many imagers often use a higher L-to-color ratio but in my case the total integration time for the luminance provides a good SNR to pull out also fainter detail and in reverse, there's a good signal for the color data as well.
For processing, I tried to follow a more conservative approach, similar to the folks at STScI, using global image processing over local editing and little noise reduction or other measures. Image calibration and integration was done in APP and later processing in PI, followed by some final adjustments in Affinity Photo. I like to use APP for image calibration and integration since it has good adaptive statisitcal algorithms. The processing in PI for the Luminance contained a very slight hint of deconvolution, mostly to have more precise stars as my setup is oversampling given my average seeing conditions. I then employed the ASinh intensity transformations in two subsequent runs to stretch the data.
For the color channels, I first used ABE after channel combination, followed by PCC. I applied a masked TGV denoise with a reduced SCNR to cut off the extreme cases of noise, but again, in a very conservative manner. The color image was stretched using two runs of HT.
After exporting the streched color and luminance images as 16-bit TIFFs, I did the final work in Affinity Photo, which includes some color saturation, tonal fine tuning and detail enhancement. The result is what's shown here.

Contrary to common framing, I chose to have North pointing down for aesthetic reasons.

[1] distance information from SIMBAD
[2] Lonely Galaxy Lost in Space, NASA