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Dark Nebula LDN881 in Hα/SII/OIII+rgb | by Carballada
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Dark Nebula LDN881 in Hα/SII/OIII+rgb


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.


"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 HSO palette, please also check my natural palette on this link:


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



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% job: 3811511


RA center: 20h 18' 42"


DEC center: +39° 43' 1"


Pixel scale: 1.007 arcsec/pixel


Orientation: 90.555 degrees


Field radius: 0.403 degrees


Resolution: 2308x1724


Locations: AAS Montsec, Àger, Lleida, Spain


Data source: Own remote observatory


Remote source: Non-commercial independent facility

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Uploaded on August 31, 2020