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Sh2-129 / OU4 / Flying Bat & Squid Nebula

Classification: Emission Nebula Sh2-129 & Ou4
Constellation: Cepheus (CEP)
Object Location: Ra 21h 12m 36s Dec +60° 04’45” (current)
Size & Distance: Apx.140x90 Apx 2300 light years

Date & Location: 7-4/5 & 7-26-2019 Palomar Mountain, CA.
Exposure: SHO 120, 120, 480, S2&Ha 6 x 20, O3-24 x 20 (bin 1x1)
Optics: Telescope Engineering Company APO110FL w/ TEC FF @ f/5.74, 631mm using the Optec FocusLynx.
Mount: Astro-Physics 1200 GTOCP4 / ATS 10x36 pier.
Camera: FLI-PL16803 @-25c / FLI CFW5-7 / Guided by SBIG ST-I / w OAG.
Filters: Astrodon 3nm S2,Ha, O3
Software: MaxImDL 6.10, Photoshop CC, CCDStack, Topaz Studio.

Notes: Sky conditions: Above and Below average seeing, winds 10-15, Temp mid 60’s
Image Field of view is 183 x 183 arcmin. Image Scale 2.94 arcsec/pix


Sh2-129 known as The Flying Bat Nebula in Cepheus is a very large Emission Nebula, the blue nebula called OU4 The Squid Nebula was only just discovered in 2011 by the French amateur astronomer Nicolas Outters and is extremely dim. This image is north up, and Vdb 140 is seen in the lower left.