IC63 & IC59 - The Ghosts of γCas (Vincent Savioz)

Celestial hemisphere: Northern · Constellation: Cassiopeia (Cas) · Contains: 27 gam Cas · IC 59 · IC 63 · Sh2-185 · The star Navi (γCas) · gamma Cas nebula

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IC63 & IC59 - The Ghosts of γCas

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IC63 & IC59 - The Ghosts of γCas

IC63 and IC59 are two diffuse nebulae in the constellation Cassiopeia at about 600 lightyears. These clouds are only 3 or 4 lightyears away from the bright star Gamma Cas. Its ultraviolet radiation is slowly dissipating them and ionize the surrounding gas, making it shine.

We often see these nebulae in HaLRGB, that’s why I decided to improve a little bit and make a SHO image! Actually, a few people did it before ^^. I was later surprised to see how much Sii there was in these clouds of glowing gas. In fact, there’s a strong signal near every edge of the nebula, which is translated as bright orange/yellow in this image. It’s not too obvious here because Ha is also strong in these regions. Oiii is almost inexistent. The artifacts around the bright star are not due to processing. It’s actually due to the ZWO ASI1600 glass in front of the sensor (from what I read on forums).

Overall, I’m happy with this image. Details are fine, and the noise kept under control. As always, advice and criticism are welcome!

The refractors!
ZWO ASI1600MM/QHY163M
Narrowband imaging
Imagers of Switzerland

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Status	Advanced success
Started	...
Astrometry.net job	4015590
PixInsight job	AZXUN01G9LYZ9O6DD2I7TO3H14SMGIR6
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	01h00m13s.15
RA (top/left)	00h54m38s.60
RA (top/right)	00h55m20s.96
RA (bottom/right)	01h05m31s.36
RA (bottom/left)	01h05m21s.52

Dec (center)	+60°46′13″.10
Dec (top/left)	+61°35′26″.4
Dec (top/right)	+59°53′50″.5
Dec (bottom/right)	+59°56′12″.3
Dec (bottom/left)	+61°37′56″.2

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IC63 & IC59 - The Ghosts of γCas

IC63 & IC59 - The Ghosts of γCas

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IC63 & IC59 - The Ghosts of γCas

IC63 & IC59 - The Ghosts of γCas

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