www.astrobin.com/392805/

I tried to provide high dynamic range using an ASI1600.
For that I used a different gains and HDR techniques and … a lot of captures.

Messier 81 (also known as NGC 3031 or Bode’s Galaxy) is a spiral galaxy about 12 million light-years away, with at diameter of 90,000 light years, about half the size of the Milky Way, in the constellation Ursa Major. (right side of the image)
Messier 82 (also known as NGC 3034, Cigar Galaxy or M82) is a starburst galaxy approximately 12 million light-years away in the constellation Ursa Major.
M82 is being physically affected by its larger neighbor, the spiral M81. Tidal forces caused by gravity have deformed M82, a process that started about 100 million years ago.
Ignoring any difference in their respective distances from the Earth, the centers of M81 and M82 are visually separated by about 130,000 light-years.
(desc.credits Wikipedia)

Technical card
Imaging telescope or lens:Teleskop Service TS Photoline 107mm f/6.5 Super-Apo

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 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: 2250×1714

Dates:Feb. 3, 2019, Feb. 9, 2019, Feb. 10, 2019

Frames:
Astrodon B Gen.2 E-series 36mm: 50×60" (gain: 1.00) -20C bin 1×1
Astrodon B Gen.2 E-series 36mm: 30×120" (gain: 75.00) -20C bin 1×1
Astrodon B Gen.2 E-series 36mm: 75×60" (gain: 75.00) -20C bin 1×1
Astrodon G Gen.2 E-series 36mm: 50×60" (gain: 1.00) -20C bin 1×1
Astrodon G Gen.2 E-series 36mm: 30×120" (gain: 75.00) -20C bin 1×1
Astrodon G Gen.2 E-series 36mm: 75×60" (gain: 75.00) -21C bin 1×1
Astrodon L Gen.2 E-series 36mm: 99×30" (gain: 1.00) -20C bin 1×1
Astrodon L Gen.2 E-series 36mm: 174×30" (gain: 75.00) -20C bin 1×1
Astrodon L Gen.2 E-series 36mm: 84×60" (gain: 75.00) -20C bin 1×1
Astrodon R Gen.2 E-series 36mm: 50×60" (gain: 1.00) -20C bin 1×1
Astrodon R Gen.2 E-series 36mm: 30×120" (gain: 75.00) -20C bin 1×1
Astrodon R Gen.2 E-series 36mm: 75×60" (gain: 75.00) -20C bin 1×1

Integration: 12.9 hours

Avg. Moon age: 12.50 days

Avg. Moon phase: 15.40%

Astrometry.net job: 2548303

RA center: 148.947 degrees

DEC center: 69.353 degrees

Pixel scale: 2.940 arcsec/pixel

Orientation: 90.965 degrees

Field radius: 1.155 degrees

Locations: AAS Montsec, Àger, Lleida, Spain

Data source: Own remote observatory

Remote source: Non-commercial independent facility

via Flickr https://flic.kr/p/2dy1D3R

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