SH2-129 (flying Bat nebula) and OU4 (squid nebula) with LRGB stars (kaelig)

Celestial hemisphere: Northern · Constellation: Cepheus (Cep) · Contains: HD202214 · HD202380 · HD239618 · LBN 449 · LBN 453 · Sh2-129

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SH2-129 (flying Bat nebula) and OU4 (squid nebula) with LRGB stars

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SH2-129 (flying Bat nebula) and OU4 (squid nebula) with LRGB stars

This image is composed with two nebulaes:

- SH2-129 (Ha nebula): Flying Bat nebula (Nébuleuse de la Chauve-Souris)
- OU4 (Oiii nebula): squid nebula (nébuleuse du calamar)

OU4 is a recent discovery made in 2011 by Nicolas Outters, called the "Squid Nebula" due to its shape, but more officially called Ou4. This region is characterized by a very faint OIII emission and its bipolar shape reminds of a planetary nebula. (Source Wikipedia)

The pdf document of Nicolas Outters about his discovery:
http://outters.fr/wp/wp-content/uploads/2015/12/decouverte-OU4-eu.pdf

I met a lot of difficulties in the post-treatment of this image. I keep a very faint level for the O3 signal in order to keep the transparency with Halpha just under.

Original
Final
B

ASI 533MM Pro
ZWO AM5
SAR Team Astro

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Status	Advanced success
Started	...
Astrometry.net job	8688041
PixInsight job	5DNZBGWO2BVZ7RFD24LZQEGSKFHB5OVF
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	21h12m04s.70
RA (top/left)	21h06m41s.73
RA (top/right)	21h13m14s.82
RA (bottom/right)	21h17m28s.28
RA (bottom/left)	21h10m50s.29

Dec (center)	+60°00′56″.9
Dec (top/left)	+59°57′52″.5
Dec (top/right)	+59°21′34″.9
Dec (bottom/right)	+60°03′11″.6
Dec (bottom/left)	+60°40′19″.2

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SH2-129 (flying Bat nebula) and OU4 (squid nebula) with LRGB stars

SH2-129 (flying Bat nebula) and OU4 (squid nebula) with LRGB stars

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SH2-129 (flying Bat nebula) and OU4 (squid nebula) with LRGB stars

SH2-129 (flying Bat nebula) and OU4 (squid nebula) with LRGB stars

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