The Cave Nebula Sh2-155 in Sii-gilded HOOLRGB (GalacticRAVE)

Celestial hemisphere: Northern · Constellation: Cepheus (Cep) · Contains: HD216629 · HD216658 · HD216898 · HD217035 · HD217061 · HD217086 · HD217463 · LBN 524 · LBN 527 · LBN 529 · Sh2-155

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The Cave Nebula Sh2-155 in Sii-gilded HOOLRGB

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The Cave Nebula Sh2-155 in Sii-gilded HOOLRGB

The so-called Cave nebula Sh2-155 is a diffuse nebula in the constellation of Cepheus, containing emission, reflection, and dark nebulosity. This makes it a challenging object to process, as the blue reflection nebula are not caught by the Oiii image, so one really needs to blend an RGB image (not only the stars) with the narrowband image. I proceeded in a sequence blending the starless RGB with Ha, followed by Sii followed by Oiii, followed by RGB stars

data were taken on 2024 September 20, 21, 22, and 29

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Emission Nebulae

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Status	Advanced success
Started	...
PixInsight job	ALK937GHW2DZOOG3MYRCNS2OQSGF9TIL
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	22h56m37s.814
RA (top/left)	23h01m04s.252
RA (top/right)	22h55m48s.944
RA (bottom/right)	22h52m16s.887
RA (bottom/left)	22h57m24s.569

Dec (center)	+62°27′03″.30
Dec (top/left)	+62°45′31″.17
Dec (top/right)	+63°02′25″.61
Dec (bottom/right)	+62°08′04″.88
Dec (bottom/left)	+61°51′43″.41

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The Cave Nebula Sh2-155 in Sii-gilded HOOLRGB

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The Cave Nebula Sh2-155 in Sii-gilded HOOLRGB

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