Sh2-129 & Ou4, Flying Bat Nebula and Squid Nebula (Maurice Toet)

Celestial hemisphere: Northern · Constellation: Cepheus (Cep)

Sh2-129 & Ou4, Flying Bat Nebula and Squid Nebula, Maurice Toet

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Sh2-129 & Ou4, Flying Bat Nebula and Squid Nebula

Link: https://www.mauricetoet.nl/DeepSky/i-px4BRjx/A

Powered byPixInsight

Sh2-129 & Ou4, Flying Bat Nebula and Squid Nebula

Link: https://www.mauricetoet.nl/DeepSky/i-px4BRjx/A

The blue feature that resembles a giant squid is planetary nebula Ou4 discovered by Nicolas Outters in 2011. It lies within the emission region Sh2-129 (golden/yellow in this false colour image), the Flying Bat Nebula. Ou4 requires long exposure times through an OIII filter in order to discern. Thanks to modern CMOS technology (low read-out noise) coupled to fast optics, I was able to capture it with 'just' 8.5 hours of integration time. I actually made about 20 hours of sub-exposures in OIII, but many subs turned out to be unusable due to hazy conditions and/or washed out sky backgrounds caused by assimilation light of nearby agriculture. Hα is way less affected by light pollution. Therefore I was able to use all the Hα-subs totalling up to an integration time of 20.3 hours in Hα.

Astro Pixel Processor (data reduction, stacking, channel combining, gradient removal), Adobe Photoshop (post-processing, StarXTerminator, NoiseXTerminator), PixInsight (SCNR)

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Status	Basic success
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Astrometry.net job	6816618
PixInsight job	n/a
PixInsight queue size	n/a
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Sh2-129 & Ou4, Flying Bat Nebula and Squid Nebula

Sh2-129 & Ou4, Flying Bat Nebula and Squid Nebula

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Sh2-129 & Ou4, Flying Bat Nebula and Squid Nebula

Sh2-129 & Ou4, Flying Bat Nebula and Squid Nebula

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