Cosmic Soul (Bogdan Borz)

Cosmic Soul

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.

Broadband under Bortle 7/8/9
ZWO ASI1600MM/QHY163M
AAA : Astronomes et Astrographes Amateurs
Spectroscopy
Astrophotographes (France)
Fine Art Astrophotography
Narrowband imaging
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Status	Advanced success
Started	...
Astrometry.net job	4029176
PixInsight job	PXE253DXLPT5DBH3QY5CMPTWNK71TD7F
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	02h57m17s.855
RA (top/left)	02h59m47s.719
RA (top/right)	03h00m42s.677
RA (bottom/right)	02h54m43s.340
RA (bottom/left)	02h53m58s.791

Dec (center)	+60°37′09″.57
Dec (top/left)	+60°05′23″.76
Dec (top/right)	+61°04′12″.61
Dec (bottom/right)	+61°08′44″.16
Dec (bottom/left)	+60°09′48″.26

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