Sh2-155 Cave Nebula + Sh2-154 (Narrowband S-HO-O + True Color Stars) (Douglas Triggs)

Celestial hemisphere: Northern · Constellation: Cepheus (Cep) · Contains: LBN 521 · LBN 524 · LBN 527 · LBN 529 · LDN 1212 · LDN 1215 · LDN 1216 · LDN 1218 · NGC 7419 · PK110+01.1 · Sh2-154 · Sh2-155 · VdB155

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Sh2-155 Cave Nebula + Sh2-154 (Narrowband S-HO-O + True Color Stars)

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Sh2-155 Cave Nebula + Sh2-154 (Narrowband S-HO-O + True Color Stars)

This is the field including the Cave Nebula (Sh2-155) plus nearby Sh2-154 (and a little NGC open cluster) taken over the course of more than a month.

This is a bit of an odd palette: it's not quite SHO, it's more or less R=SII, G=Hɑ mixed with OIII, B=OIII. More or less. It's somewhat similar (but not exactly the same) as the color palette I used for the Bubble + Claw, etc. It's a lot more subtle than SHO, which I think is a bit garish for a lot of objects like this that don't have a lot of OIII anywhere. It's got a bit of the subtlety of a bicolor palette, but a little more color range than that, even if it doesn't hit you in the face with it. I think it works better for more difficult fields to process like this one.

It also has true-color stars composited in.

Anyway. Hope you like it.

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Status	Advanced success
Started	...
Astrometry.net job	7138155
PixInsight job	LOIW9LWJ8IOTTBTZ2GX3AZUQFT5SQDYL
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	22h54m15s.24
RA (top/left)	22h53m31s.44
RA (top/right)	22h43m36s.57
RA (bottom/right)	22h54m55s.24
RA (bottom/left)	23h05m20s.31

Dec (center)	+61°58′34″.2
Dec (top/left)	+63°23′51″.2
Dec (top/right)	+61°18′58″.2
Dec (bottom/right)	+60°33′12″.7
Dec (bottom/left)	+62°35′00″.2

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Sh2-155 Cave Nebula + Sh2-154 (Narrowband S-HO-O + True Color Stars)

Sh2-155 Cave Nebula + Sh2-154 (Narrowband S-HO-O + True Color Stars)

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Sh2-155 Cave Nebula + Sh2-154 (Narrowband S-HO-O + True Color Stars)

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