From Navi to Schedar (Jérémie)

From Navi to Schedar

Probably my most challenging post-processing so far...

I wanted to frame part of Cassiopeia with the well known NGC281 and 2 nebulas I have seen recently in very nice pictures of other astrophotographers, IC63 and IC59. I wanted to tackle it myself, but with less success...

I have taken the L,R,G,B and Ha over 4 nights, in different conditions, sometimes forgetting to make flats between changes of filters, with a very present moon, and in the middle of a 50+ k inhabitants city in the suburb of Paris (with my neighbours having lights in their garden and surrounded by streetlights...).

I bought a license of Pixinsight, and moved from Siril to this wonderful software. Siril was working great, but I had lots of troubles getting rid the gradients of these middle-wide field images, and the crazy chromatic abbertaion coming from the different FWHM of stars between series of filters.... I really love this software so far, it is a nice toolbox.

For the final framing of the picture I have stolen the template of Brice Blanc, that I find very elegant :-) Merci !

My light setup didn't allow me to frame exactly how I wanted, and therefore, the intersection of all my frames have made me lose part of all the fantastic objects that are in this region : particularly the open cluster C13... It is on my pictures, but the cropping didn't include it. Should have shot with a wider lens ! That's also the reason of the diagonal blanck bands on the corner.

Finally, playing with PixInsight, I re-used my Ha, OIII and SII data from my previous shot of NGC 281 with a 346 mm focal length, just to add a blue/green touch in Pac Man and the Ha to get more details on the dust clouds that shapes it (the Mitakon SPeedmaster had nice details, but 85mm cannot compete with 346 mm :-) even when downscaling it to fit inside the wide field of view).

Original
Final
B

B

Description: Revisited version, more readable, with less visible stars and more saturated colors on the nebulaes.

Uploaded: ...

Imaging from Paris (and close neighborhood)
iOptron Skyguider Pro
AAA : Astronomes et Astrographes Amateurs
Astrophotographes (France)
ZWO ASIAIR PRO USERS
Suburban Astrophotography
PixInsight Addicts
Camera Lens Astrophotography
Sharpless2 Objects
ZWO ASI183/QHY183
Light Polluted skies

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	Image of the day	Top pick	Top pick nominations	Total submitted
Deep sky
Solar system
Extremely wide field
Star trails
Northern lights
Noctilucent clouds
Landscape

	Image of the day	Top pick	Top pick nominations	Total submitted
Backyard
Traveller
Own remote observatory
Amateur hosting facility
Public amaeteur data
Professional, scientific grade data
Mix of multiple sources
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Status	Advanced success
Started	...
Astrometry.net job	4083164
PixInsight job	YQY17QMSRAVOLU188BBSLUUCWI4DMR73
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	00h55m59s.99
RA (top/left)	00h33m06s.60
RA (top/right)	00h37m30s.46
RA (bottom/right)	01h14m37s.87
RA (bottom/left)	01h18m38s.36

Dec (center)	+58°46′45″.3
Dec (top/left)	+62°13′13″.9
Dec (top/right)	+55°07′26″.1
Dec (bottom/right)	+55°09′00″.8
Dec (bottom/left)	+62°15′59″.9

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