Hemisphere:  Northern  ·  Constellation: Cygnus (Cyg)
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Dark Nebula LDN881 in Hα-SII/OIII/OIII+rgb, 


            Jose Carballada
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Dark Nebula LDN881 in Hα-SII/OIII/OIII+rgb

Imaging telescopes or lenses: Altair Astro RC250-TT 10" RC Truss Tube  ·  Teleskop Service TS Photoline 107mm f/6.5 Super-Apo

Imaging cameras: ZWO ASI183MM-Cool  ·  ZWO ASI1600MM-Cool

Mounts: Mesu 200 Mk2  ·  Skywatcher EQ6R Pro

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, 2020July 22, 2020July 25, 2020July 26, 2020July 28, 2020July 29, 2020

Astrodon B Gen.2 E-series 36mm: 90x30" (gain: 75.00) -15C bin 1x1
Astrodon G Gen.2 E-series 36mm: 90x30" (gain: 75.00) -15C bin 1x1
Astrodon HA 36mm - 5nm: 205x600" (gain: 200.00) -15C bin 1x1
Astrodon O-III 36mm - 5nm: 110x600" (gain: 183.00) -15C bin 1x1
Astrodon R Gen.2 E-series 36mm: 90x30" (gain: 75.00) -15C bin 1x1
Astrodon S-II 36mm - 5nm: 111x600" (gain: 183.00) -15C bin 1x1

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: 2328x1726

Locations: AAS Montsec, Àger, Lleida, Spain

Data source: Own remote observatory

Remote source: Non-commercial independent facility


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: