www.astrobin.com/413187

Iris Nebula is dramatic reflection nebula in the constellation Cepheus.
With plenty of dark interstellar dust is illuminated by a central hot star named SAO 19158 which is 10 times the mass of our sun.

It lies 1,300 light-years away and is six light-years across.

It was integrated only 15 hours, 50% best frames of the total valid frames taken between May and June of 2019.

PD: I am glad to check my improvements when I compare to this other capture from three years ago. 😀
www.astrobin.com/263914

Technical card
Imaging telescope or lens:Altair Astro RC250-TT 10″ RC Truss Tube

Imaging camera:ZWO ASI1600MM-Cool

Mount:Astro-Physics Mach-1 GTO CP4

Guiding telescope or lens:Celestron OAG Deluxe

Guiding camera:QHYCCD QHY5III174

Focal reducer:Riccardi Reducer/Flattener 0.75x

Software:Main Sequence Software Seqence Generator Pro, Astro-Physics AAPC, Pleiades Astrophoto PixInsight

Filters:Astrodon L Gen.2 E-series 36mm, Astrodon B Gen.2 E-series 36mm, Astrodon G Gen.2 E-series 36mm, Astrodon R Gen.2 E-series 36mm

Accessories:ZWO EFW, MoonLite NiteCrawler WR30

Resolution: 2318×1665

Dates:June 1, 2019

Frames:
Astrodon B Gen.2 E-series 36mm: 41×180″ (gain: 75.00) -20C bin 1×1
Astrodon G Gen.2 E-series 36mm: 40×180″ (gain: 75.00) -20C bin 1×1
Astrodon L Gen.2 E-series 36mm: 177×180″ (gain: 75.00) -20C bin 1×1
Astrodon R Gen.2 E-series 36mm: 42×180″ (gain: 75.00) -20C bin 1×1

Integration: 15.0 hours

Avg. Moon age: 27.55 days

Avg. Moon phase: 4.36%

Astrometry.net job: 2777189

RA center: 315.429 degrees

DEC center: 68.162 degrees

Pixel scale: 1.007 arcsec/pixel

Orientation: 270.122 degrees

Field radius: 0.399 degrees

Locations: AAS Montsec, Àger, Lleida, Spain

Data source: Own remote observatory

Remote source: Non-commercial independent facility

via Flickr https://flic.kr/p/2gqwHtV

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