Cave Nebula (OSH) (Linda)

Celestial hemisphere: Northern · Constellation: Cepheus (Cep) · Contains: LBN 527 · LBN 529 · Sh2-155

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Cave Nebula (OSH)

Link: https://lindasastronomyadventures.space/?p=10118

Powered byPixInsight

Cave Nebula (OSH)

Link: https://lindasastronomyadventures.space/?p=10118

This description is for the OSH version in revision B. For the description of the HOS version in revision A, see the text below the dashed line.

O, S and H:
dynamic crop
histogram transformation
tgv denoise
clone H as lum

OHS:
channel combination (OHS)
histogram transformation
channel combination in the lum
curves
pixel math in stars

lum
LHE (2 scales)
MLT sharpening

stars
channel combination (OHS)
histogram transformation

-------------------------------------------------------------------------------------------
The acquisition on this got away from me a bit. I ended up with 50 hours of data of which 46 ended up being usable.

Oxygen ended up being very faint in the nebula. It wasn't even visible in the subs but did show up when stacked. SII was quite a bit stronger and of course, hydrogen was the major signal.

I chose the HOS palette because it put OIII in green and being the weakest signal would not bias the image toward green. The combination of red for H-a and blue for SII came out aesthetically pleasing and gave it a natural color feel even if it is a color mapped image.

Processing on the H, S and O masters:
TGV Denoise
Deconvolution
Linear Fit (to H)

On the HOS master:
Channel Combination
Histogram Transformation
TGV Denoise
LHE (2 scales)
Curves (contrast)
Adam Block's Star De-emphasis
Adv Sharpening script
Dark Structure Enhance Script

Original
Final
B

B

Description: see main description for details

Uploaded: ...

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DSOC Ceravolo

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Status	Advanced success
Started	...
Astrometry.net job	5134457
PixInsight job	A1IWJ9SFRDNN6OGTJ5414C6NB8LU6O5L
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	22h57m52s.695
RA (top/left)	23h00m27s.117
RA (top/right)	23h00m37s.875
RA (bottom/right)	22h55m22s.661
RA (bottom/left)	22h55m02s.950

Dec (center)	+62°26′15″.97
Dec (top/left)	+62°51′36″.71
Dec (top/right)	+62°02′02″.70
Dec (bottom/right)	+62°00′44″.76
Dec (bottom/left)	+62°50′16″.57

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Cave Nebula (OSH)

Cave Nebula (OSH)

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B

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Sky plot

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Contribution Index (beta):

Cave Nebula (OSH)

Cave Nebula (OSH)

Equipment

Acquisition details

Description

Comments

Revisions

B

Acquired at

Sky plot

Histogram

In these public groups

In these collections

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