Hemisphere:  Northern  ·  Constellation: Cassiopeia (Cas)  ·  Contains:  IC 1871  ·  Sh2-199
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Cosmic Soul, 



    
        

            Bogdan Borz
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Cosmic Soul

Getting plate-solving status, please wait...
Cosmic Soul, 



    
        

            Bogdan Borz
Powered byPixInsight

Cosmic Soul

Imaging telescopes or lenses: Teleskop Service ONTC 10" f4 Newton

Imaging cameras: ZWO 1600mm Cooled Pro

Mounts: Skywatcher AZEQ6

Guiding cameras: ZWO ASI 120 mini

Focal reducers: GPU Pal Gyulai GPU coma corrector

Software: Pleiades Astrophoto PixinsIght  ·  PhotoShop

Filters: Astrodon S2 3nm 36mm  ·  ZWO G 36mm  ·  ZWO B 36mm  ·  ZWO R 36mm  ·  Astrodon O3 3nm 36mm  ·  Astrodon Ha 3nm 36mm

Accessory: ZWO EAF Electronic Auto Focuser


Dates:Nov. 12, 2020Nov. 13, 2020Nov. 14, 2020Nov. 17, 2020Nov. 18, 2020

Frames:
Astrodon Ha 3nm 36mm: 80x300" (6h 40') (gain: 139.00) -20C bin 1x1
Astrodon O3 3nm 36mm: 84x300" (7h) (gain: 139.00) -20C bin 1x1
Astrodon S2 3nm 36mm: 79x300" (6h 35') (gain: 139.00) -20C bin 1x1
ZWO B 36mm: 30x60" (30') (gain: 75.00) -20C bin 1x1
ZWO G 36mm: 30x60" (30') (gain: 139.00) -20C bin 1x1
ZWO R 36mm: 30x60" (30') (gain: 75.00) -20C bin 1x1

Integration: 21h 45'

Darks: 50

Flats: 30

Flat darks: 30

Avg. Moon age: 17.77 days

Avg. Moon phase: 7.63%

Bortle Dark-Sky Scale: 8.00


RA center: 02h57m17s.855

DEC center: +60°3709.57

Pixel scale: 0.782 arcsec/pixel

Orientation: 95.885 degrees

Field radius: 0.615 degrees

More info:Open 


Resolution: 4554x3360

Locations: Backyard, Toulouse, Occitanie, France

Data source: Backyard

Description

Finally, I managed to complete a deep sky project. This is a really spectacular star forming region in Cassiopeia, situated at 7500 ly away from us, in the Perseus spiral arm of the Milky Way. Shot in SHO palette with RGB stars.

This was one tough project... I started the acquisitions in September, taking advantage of some clear nights. I noticed weird shapes around the stars, fuzzy half-contours and sometimes some weird bright tails, especially around the bright stars. Looked like reflections and the subs were not equally bad, sometimes the shapes were pretty round. Never had that before. I started shooting the Ha close to the full moon, so I told myself it will get better when the Moon goes away. Same problem. So I finally did what had already planned before, moved the primary mirror further down the tube and raised the focuser in order avoid the protrusion of the Coma Corrector inside the tube. Same effect... I started thinking that I'll throw away the scope and never touch a Newtonian again. And in the end I had an epiphany : since the ONTC is open in the rear and there is some space around the primary, I used to put a black cloth around the rear end, sock-like. This cloth is not velvet, is made of synthetic material and it has some reflections in spite of being black... So that was the simplest solution to this head ache, just took it off and the scope started working like before.

In the end I had to throw 40 hours of data, even the round stars had some small haziness around the edges. Back to the drawing board and here is the result, I had to start it all from scratch. Hope you like it.

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