Sh2-129 Flying Bat and OU4 Squid (Larry S)

Celestial hemisphere: Northern · Constellation: Cepheus (Cep) · Contains: LBN 445 · LBN 446 · LBN 449 · LBN 453 · Sh2-129 · VdB140

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Sh2-129 Flying Bat and OU4 Squid

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Sh2-129 Flying Bat and OU4 Squid

Sh2-129 Flying Bat and OU4 Squid nebulae in Cepheus. It is a large but very faint complex. The blue squid (Oxygen III) is extremely hard to capture. The red bat is mostly Hydrogen-alpha and Sulfur II. Stars are RGB.

This is a really challenging target. I tried several times over the past years, but was never able to get a decent image of the squid. I decided to try again with my new Tak Baby Q. It was much better, but even after about 12 hours of OIII using prime focus with flattener and APS-C sensor (ASI2600MM), I wasn't happy with the result. So, I decided to try using the x0.73 reducer to boost scope to f/3.8 and chose the ASI294MM camera since the field size with reducer was very close to the previously captured data.

This is the best I have managed so far, I tried adding Ha as Lum to bring out more of the bat, but it seemed to overpower the squid. I will probably try it again next year.

Original
C
Final
E

C

Description: Decreased stars

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Status	Advanced success
Started	...
Astrometry.net job	5092788
PixInsight job	R026EJ9DNM89XH5P777LISAG7VFQDUJ2
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	21h12m04s.58
RA (top/left)	21h19m20s.40
RA (top/right)	21h20m14s.88
RA (bottom/right)	21h04m08s.90
RA (bottom/left)	21h04m34s.90

Dec (center)	+59°50′57″.9
Dec (top/left)	+58°22′02″.2
Dec (top/right)	+61°17′12″.3
Dec (bottom/right)	+61°18′18″.7
Dec (bottom/left)	+58°23′11″.1

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Sh2-129 Flying Bat and OU4 Squid

Sh2-129 Flying Bat and OU4 Squid

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Sh2-129 Flying Bat and OU4 Squid

Sh2-129 Flying Bat and OU4 Squid

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C

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