Hemisphere:  Northern  ·  Constellation: Cepheus (Cep)  ·  Contains:  LDN 1177  ·  Sh2-136  ·  VdB141
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The Ghost Nebula (LRGB), 



    
        

            Linda
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Getting plate-solving status, please wait...
The Ghost Nebula (LRGB), 



    
        

            Linda
Powered byPixInsight
Imaging Telescopes Or Lenses
Planewave CDK14
Imaging Cameras
Finger Lakes Instruments Proline 16803
Mounts
Astro-Physics 1600GTO
Filters
Astrodon Gen 2 Series I Luminance · Astrodon Gen 2 Series I Green · Astrodon Gen 2 Series I Blue · Astrodon Gen 2 Series I Red
Accessories
Innovations Foresight ONAG
Software
Pleaides Astrophoto PixInsight 1.8 Ripley · Starkeeper Voyager · PHD2
Guiding Telescopes Or Lenses
Planewave CDK14
Guiding Cameras
ZWO ASI174MM

Acquisition details

Dates:
Oct. 6, 2021
Frames:
Astrodon Gen 2 Series I Blue: 5x600" (50') -25°C bin 2x2
Astrodon Gen 2 Series I Green: 12x600" (2h) -25°C bin 2x2
Astrodon Gen 2 Series I Luminance: 32x900" (8h) -25°C bin 1x1
Astrodon Gen 2 Series I Red: 7x600" (1h 10') -25°C bin 2x2
Integration:
12h
Avg. Moon age:
0.03 days
Avg. Moon phase:
0.00%

RA center: 21h16m09s.176

DEC center: +68°1238.99

Pixel scale: 0.728 arcsec/pixel

Orientation: 178.974 degrees

Field radius: 0.360 degrees

WCS transformation: thin plate spline

More info:Open 

Resolution: 2684x2340

Locations: Sierra Remote Observatories, Auberry, California, United States

Description

It seems October is when all the ghostly nebulae come out to play.

This is 12 hours of LRGB data on Vdb 141, the Ghost Nebula. Smoke cost a great deal of data, especially blue. Data was collected between October 1 and October 11, 2021. Smoke caused more than ½ the lum, and far more than ½ of the color filter data to be discarded. We would have kept going with acquisition but the waxing moon was going to interfere soon. Thankfully there was enough luminance to get a decent image out of this.

Processing:

R, G and B:
dynamic crop
DBE

L:
dynamic crop
DBE
MLT noise reduction
histogram transformation

RGB:
channel combination
PCC
MLT noise reduction (chrominance only)
LRGB Combination to add in L
TGV denoise (very mild noise reduction)
EZ Star Reduction script
Curves for contras and color

I kept processing deliberately simple because it was relatively noise, especially in the chrominance so I didn't try to do much with contrast and avoided things like LHE and sharpening. There wasn't a lot of actual detail in this dust cloudy to really enhance anyway so sharpening seemed like it wouldn't do much at best.

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