Really beautiful object catalogued as 881 on the Lynds’ Catalogue of Dark Nebulae.
It’s one of the jewels that you could find on gamma Cygni nebula, on SADR region of Cygnus, one of my favorites regions of the sky.
(credits Aladin)“A dark nebula or absorption nebula is a type of interstellar cloud that is so dense that it obscures the visible wavelengths of light from objects behind it, such as background stars and emission or reflection nebulae. The extinction of the light is caused by interstellar dust grains located in the coldest, densest parts of larger molecular clouds.” (wiki)
It was necessary to integrate more than 70 hours to show all faint and nice details on the estructure.
Here was captured using the more natural palette, please also check my HSO palette on this link:
flic.kr/p/2jBZr7x
Technical card
Imaging telescopes or lenses:Teleskop Service TS Photoline 107mm f/6.5 Super-Apo , Altair Astro RC250-TT 10″ RC Truss Tube
Imaging cameras:ZWO ASI183MM-Cool , ZWO ASI1600MM-Cool
Mounts:Skywatcher EQ6R Pro , Mesu 200 Mk2
Guiding telescopes or lenses:Celestron OAG Deluxe , Teleskop Service TSOAG9 Off-Axis Guider
Guiding cameras:ZWO ASI174 Mini , ZWO ASI290 Mini
Focal reducers:Riccardi Reducer/Flattener 0.75x , Telescope-Service TS 2″ Flattener
Software:Pleiades Astrophoto PixInsight , Seqence Generator Pro
Filters:Astrodon O-III 36mm – 5nm , Astrodon S-II 36mm – 5nm , Astrodon R Gen.2 E-series 36mm , Astrodon G Gen.2 E-series 36mm , Astrodon B Gen.2 E-series 36mm , Astrodon HA 36mm – 5nm , Astrodon L Gen.2 E-series 36mm
Accessory:ZWO EFW , MoonLite NiteCrawler WR30 , TALON6 R.O.R , MoonLite CSL 2.5″ Focuser with High Res Stepper Motor
Dates:July 21, 2020 , July 22, 2020 , July 25, 2020 , July 26, 2020 , July 28, 2020 , July 29, 2020
Frames:
Astrodon B Gen.2 E-series 36mm: 90×30″ (gain: 75.00) -15C bin 1×1
Astrodon G Gen.2 E-series 36mm: 90×30″ (gain: 75.00) -15C bin 1×1
Astrodon HA 36mm – 5nm: 205×600″ (gain: 200.00) -15C bin 1×1
Astrodon O-III 36mm – 5nm: 110×600″ (gain: 183.00) -15C bin 1×1
Astrodon R Gen.2 E-series 36mm: 90×30″ (gain: 75.00) -15C bin 1×1
Astrodon S-II 36mm – 5nm: 111×600″ (gain: 183.00) -15C bin 1×1
Integration: 73.2 hours
Avg. Moon age: 5.35 days
Avg. Moon phase: 33.86%
Astrometry.net job: 3811358
RA center: 20h 18′ 42″
DEC center: +39° 43′ 1″
Pixel scale: 1.007 arcsec/pixel
Orientation: 90.555 degrees
Field radius: 0.405 degrees
Resolution: 2328×1726
Locations: AAS Montsec, Àger, Lleida, Spain
Data source: Own remote observatory
Remote source: Non-commercial independent facility
via Flickr https://flic.kr/p/2jBZnGS