SH2-155 The Cave Nebula - HOOLRGB (Brian Puhl)

Celestial hemisphere: Northern · Constellation: Cepheus (Cep) · Contains: LBN 521 · LBN 524 · LBN 527 · LBN 529 · LDN 1215 · LDN 1216 · LDN 1218 · PK110+01.1 · Sh2-154 · Sh2-155 · VdB155

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SH2-155 The Cave Nebula - HOOLRGB

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SH2-155 The Cave Nebula - HOOLRGB

A rough week of seeing really set this image back a little more than I would have liked. My skies normally give me mid 2" seeing, but this given week was closer to 3.5". Working hard with narrowband subtraction and emissionless processing, I tried my hardest to regain some of the details...but it wasn't really happening. Relying on the sharper data coming from the Ha layer, I was able to bring back some sharpness of the reflection nebula. The combination of emission and dark nebula/dust is a tough one to make work. Looking forward, I may try this again next season with ONLY LRGB instead of adding the narrowband data. Then again, maybe if my seeing was a bit better, I could have brought out the dust a little better. A seemingly simple, yet tough target to make work. Took me about 5 renditions over 2 weeks to make this work. The Ha is a little strong in the final image, and the Oiii unfortunately was a bit weaker than I honestly expected, leading to a primarily red image. Overall, I hope you enjoy it.

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Status	Advanced success
Started	...
Astrometry.net job	8658170
PixInsight job	1M02VHG57R8K8HQMHPSTYCH0GGJTSE3B
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	22h56m06s.30
RA (top/left)	22h49m45s.28
RA (top/right)	22h49m02s.41
RA (bottom/right)	23h01m57s.27
RA (bottom/left)	23h03m43s.38

Dec (center)	+62°10′28″.7
Dec (top/left)	+63°23′57″.8
Dec (top/right)	+61°01′21″.5
Dec (bottom/right)	+60°55′49″.2
Dec (bottom/left)	+63°18′00″.9

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SH2-155 The Cave Nebula - HOOLRGB

SH2-155 The Cave Nebula - HOOLRGB

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SH2-155 The Cave Nebula - HOOLRGB

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