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. 😀
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
Dates:June 1, 2019
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