For me a very difficult target.
Perfect to compare the performance of the new filters, mount and focuser.
Really an improvement from last year non published picture. www.astrobin.com/298085
Anyway, I don’t try to solve the small inside, maybe at some point next year 😀
Technical card
Imaging telescope or lens:Altair Astro RC250-TT 10" RC Truss Tube
Imaging camera:ZWO ASI1600MM-Cool
Mounts:Skywatcher AZ EQ-6 GT, Astro-Physics Mach-1 GTO CP4
Guiding telescope or lens:Celestron OAG Deluxe
Guiding camera:QHYCCD QHY5III174
Focal reducers:Astro-Physics CCDT67 – 0.67x Reducer, Riccardi Reducer/Flattener 0.75x
Software:Astro-Physics AAPC, Main Sequence Software Seqence Generator Pro, Pleiades Astrophoto PixInsight
Filters:Astrodon HA 36mm – 5nm, Astrodon O-III 36mm – 5nm, Astrodon B Gen.2 E-series 36mm, Astrodon G Gen.2 E-series 36mm, Astrodon R Gen.2 E-series 36mm, Optolong OIII 6.5nm 36mm, Optolong Ha 7nm 36mm
Accessories:MoonLite NiteCrawler WR30, MoonLite CSL 2.5" Focuser with High Res Stepper Motor
Resolution: 3916×2876
Dates: June 14, 2018, June 20, 2018, July 17, 2018
Frames:
Astrodon B Gen.2 E-series 36mm: 15×30" (gain: 200.00) -20C bin 1×1
Optolong Blue 36mm: 17×90" (gain: 200.00) -20C bin 1×1
Astrodon G Gen.2 E-series 36mm: 15×30" (gain: 200.00) -20C bin 1×1
Astrodon HA 36mm – 5nm: 12×600" (gain: 200.00) -20C bin 1×1
Optolong Ha 7nm 36mm: 6×600" (gain: 200.00) -20C bin 1×1
Astrodon O-III 36mm – 5nm: 13×600" (gain: 200.00) -20C bin 1×1
Optolong OIII 6.5nm 36mm: 17×600" (gain: 200.00) -20C bin 1×1
Astrodon R Gen.2 E-series 36mm: 15×30" (gain: 200.00) -20C bin 1×1
Optolong Red 36mm: 14×90" (gain: 200.00) -20C bin 1×1
Integration: 9.2 hours
Avg. Moon age: 4.40 days
Avg. Moon phase: 25.66%
Astrometry.net job: 2154174
RA center: 269.636 degrees
DEC center: 66.634 degrees
Pixel scale: 0.508 arcsec/pixel
Orientation: 269.888 degrees
Field radius: 0.343 degrees
Locations: Berga Resort, Berga, Barcelona, Spain
Data source: Backyard
via Flickr https://flic.kr/p/KD6HEV