WR134 in HOO-RGB (Nicola Beltraminelli)

WR134 in HOO-RGB

As already mentioned by many, WR134 is a Wolf-Rayet star located around 6,000 light years away from us in the constellation of Cygnus. the star is surrounded by a faint bubble nebula blown by the intense radiation and fast wind from the star. It is five times the radius of the sun, but due to a temperature over 63,000 K it is 400,000 times as luminous as the sun (Wikipedia). The shell is over forty parsecs wide and contains about 1,830 solar masses of hydrogen (Wikipedia).

I am definitely fascinated by this kind of deep sky objects revealing the complex nature of stars and their life. I therefore shooted this very peculiar star/nebula with the intent to show the faint oxygen shell already illustrated by brillant astrophotographers. With this in mind I was aware of the challenge to capture the faint regions of the shell (in particular with a scope with an F ratio of 6.8 and only 180mm diameter), thus I did push the system at the maximum of my current capabilities by dedicating 4 nights only for the oxygen channel and by combining captures of 300s, 600s and 900s. Thanks to the excellent performances of my GM2000 HPSII mount I could avoid autoguiding however I have to say that 900s is really the maximum I can currently do (rejection of 1 sub out of 3). The final image was obtained by combining the Ha and OIII signals using an own developed method enabling to detect the transitions between OIII and Ha.

I very slightly sharpened the image and denoised the low emitting regions to avoid too much noise. Compared to the original image I couldn't notice any artefacts and this was confirmed by comparing the final image with the ones already published.

As usual don't esitate to provide feedback and suggestions.

CS!

Nicola

Astrophotographes (France)
Duo-band, Tri-band, and Quad-band Imaging
ASI 6200 MM Pro
Fine Art Astrophotography
Processed with Photoshop

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Status	Advanced success
Started	...
Astrometry.net job	8031493
PixInsight job	CDGWU8A2UDSH5HZNA9JWLGMLIKXPKHTY
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	20h10m12s.111
RA (top/left)	20h07m57s.237
RA (top/right)	20h08m31s.326
RA (bottom/right)	20h12m25s.230
RA (bottom/left)	20h11m54s.581

Dec (center)	+36°10′57″.65
Dec (top/left)	+36°44′18″.71
Dec (top/right)	+35°33′07″.65
Dec (bottom/right)	+35°37′25″.63
Dec (bottom/left)	+36°48′42″.20

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WR134 in HOO-RGB

WR134 in HOO-RGB

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WR134 in HOO-RGB

WR134 in HOO-RGB

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