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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

www.astrobin.com/4bbrto

 

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:

flic.kr/p/2jBZnGS

 

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: 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: 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