Iteration on the Sharpless catalogue of faint nebulae.
It’s not a common object, and here is the close up. Very faint and difficult. I am really proud of it 😀
Sh2-170 is an emission nebula in Cassiopeia at around 7500 light years away.
The bright star at the centre of the nebula is ionising the surrounding hydrogen gas, causing the nebula to glow.
This nebula is about 2/3 the diameter of the full moon.
Technical card
Imaging telescope or lens:Altair Astro RC250-TT 10″ RC Truss Tube
Imaging camera:ZWO ASI1600MM-Cool
Mount:Mesu 200 Mk2
Guiding telescope or lens:Celestron OAG Deluxe
Guiding camera:ZWO ASI174 Mini
Focal reducer:Riccardi Reducer/Flattener 0.75x
Software:Main Sequence Software Seqence Generator Pro, Pleiades Astrophoto PixInsight
Filters:Astrodon L Gen.2 E-series 36mm, Astrodon HA 36mm – 5nm, Astrodon B Gen.2 E-series 36mm, Astrodon G Gen.2 E-series 36mm, Astrodon R Gen.2 E-series 36mm, Astrodon S-II 36mm – 5nm, Astrodon O-III 36mm – 5nm
Accessories:ZWO EFW, MoonLite NiteCrawler WR30
Resolution: 2328×1760
Dates:Sept. 25, 2019, Sept. 26, 2019, Sept. 27, 2019, Sept. 28, 2019
Frames:
Astrodon B Gen.2 E-series 36mm: 35×30″ (gain: 75.00) -20C bin 1×1
Astrodon G Gen.2 E-series 36mm: 35×30″ (gain: 75.00) -20C bin 1×1
Astrodon HA 36mm – 5nm: 97×600″ (gain: 200.00) -20C bin 1×1
Astrodon O-III 36mm – 5nm: 35×600″ (gain: 200.00) -20C bin 1×1
Astrodon R Gen.2 E-series 36mm: 35×30″ (gain: 75.00) -20C bin 1×1
Astrodon S-II 36mm – 5nm: 30×600″ (gain: 200.00) -20C bin 1×1
Integration: 27.9 hours
Avg. Moon age: 27.48 days
Avg. Moon phase: 6.38%
Astrometry.net job: 2980353
RA center: 0.392 degrees
DEC center: 64.612 degrees
Pixel scale: 1.007 arcsec/pixel
Orientation: 91.169 degrees
Field radius: 0.408 degrees
Locations: AAS Montsec, Àger, Lleida, Spain
Data source: Own remote observatory
Remote source: Non-commercial independent facility
via Flickr https://flic.kr/p/2husT7K